diff --git a/src/main/scala/li/cil/oc/server/component/traits/InventoryAnalytics.scala b/src/main/scala/li/cil/oc/server/component/traits/InventoryAnalytics.scala
index ff10d399fb..bc8696af44 100644
--- a/src/main/scala/li/cil/oc/server/component/traits/InventoryAnalytics.scala
+++ b/src/main/scala/li/cil/oc/server/component/traits/InventoryAnalytics.scala
@@ -7,6 +7,7 @@ import li.cil.oc.api.machine.Context
 import li.cil.oc.server.component.result
 import li.cil.oc.util.DatabaseAccess
 import li.cil.oc.util.ExtendedArguments._
+import li.cil.oc.util.InventoryUtils
 import net.minecraftforge.oredict.OreDictionary
 
 trait InventoryAnalytics extends InventoryAware with NetworkAware {
@@ -40,7 +41,7 @@ trait InventoryAnalytics extends InventoryAware with NetworkAware {
     })
   }
 
-  @Callback(doc = """function(slot:number, dbAddress:string, dbSlot:number):boolean -- Compare an item in the specified slot with one in the database with the specified address.""")
+  @Callback(doc = """function(slot:number, dbAddress:string, dbSlot:number[, checkNBT:boolean=false]):boolean -- Compare an item in the specified slot with one in the database with the specified address.""")
   def compareToDatabase(context: Context, args: Arguments): Array[AnyRef] = {
     val localSlot = args.checkSlot(inventory, 0)
     val dbAddress = args.checkString(1)
@@ -48,7 +49,7 @@ trait InventoryAnalytics extends InventoryAware with NetworkAware {
     DatabaseAccess.withDatabase(node, dbAddress, database => {
       val dbSlot = args.checkSlot(database.data, 2)
       val dbStack = database.getStackInSlot(dbSlot)
-      result(haveSameItemType(localStack, dbStack))
+      result(InventoryUtils.haveSameItemType(localStack, dbStack, args.optBoolean(3, false)))
     })
   }
 }
diff --git a/src/main/scala/li/cil/oc/server/component/traits/InventoryAware.scala b/src/main/scala/li/cil/oc/server/component/traits/InventoryAware.scala
index 5bc635ea2e..816ab6f355 100644
--- a/src/main/scala/li/cil/oc/server/component/traits/InventoryAware.scala
+++ b/src/main/scala/li/cil/oc/server/component/traits/InventoryAware.scala
@@ -3,7 +3,6 @@ package li.cil.oc.server.component.traits
 import li.cil.oc.api.machine.Arguments
 import li.cil.oc.util.ExtendedArguments._
 import net.minecraft.inventory.IInventory
-import net.minecraft.item.ItemStack
 
 trait InventoryAware {
   def inventory: IInventory
@@ -21,9 +20,4 @@ trait InventoryAware {
     else selectedSlot
 
   protected def stackInSlot(slot: Int) = Option(inventory.getStackInSlot(slot))
-
-  protected def haveSameItemType(stackA: ItemStack, stackB: ItemStack) =
-    stackA != null && stackB != null &&
-      stackA.getItem == stackB.getItem &&
-      (!stackA.getHasSubtypes || stackA.getItemDamage == stackB.getItemDamage)
 }
diff --git a/src/main/scala/li/cil/oc/server/component/traits/InventoryControl.scala b/src/main/scala/li/cil/oc/server/component/traits/InventoryControl.scala
index b4001edec4..25591dcb21 100644
--- a/src/main/scala/li/cil/oc/server/component/traits/InventoryControl.scala
+++ b/src/main/scala/li/cil/oc/server/component/traits/InventoryControl.scala
@@ -4,6 +4,7 @@ import li.cil.oc.api.machine.Arguments
 import li.cil.oc.api.machine.Callback
 import li.cil.oc.api.machine.Context
 import li.cil.oc.util.ExtendedArguments._
+import li.cil.oc.util.InventoryUtils
 import li.cil.oc.util.ResultWrapper.result
 
 trait InventoryControl extends InventoryAware {
@@ -37,11 +38,11 @@ trait InventoryControl extends InventoryAware {
     })
   }
 
-  @Callback(doc = "function(otherSlot:number):boolean -- Compare the contents of the selected slot to the contents of the specified slot.")
+  @Callback(doc = "function(otherSlot:number[, checkNBT:boolean=false]):boolean -- Compare the contents of the selected slot to the contents of the specified slot.")
   def compareTo(context: Context, args: Arguments): Array[AnyRef] = {
     val slot = args.checkSlot(inventory, 0)
     result((stackInSlot(selectedSlot), stackInSlot(slot)) match {
-      case (Some(stackA), Some(stackB)) => haveSameItemType(stackA, stackB)
+      case (Some(stackA), Some(stackB)) => InventoryUtils.haveSameItemType(stackA, stackB, args.optBoolean(1, false))
       case (None, None) => true
       case _ => false
     })
@@ -56,7 +57,7 @@ trait InventoryControl extends InventoryAware {
     }
     else result((stackInSlot(selectedSlot), stackInSlot(slot)) match {
       case (Some(from), Some(to)) =>
-        if (haveSameItemType(from, to)) {
+        if (InventoryUtils.haveSameItemType(from, to, checkNBT = true)) {
           val space = math.min(inventory.getInventoryStackLimit, to.getMaxStackSize) - to.stackSize
           val amount = math.min(count, math.min(space, from.stackSize))
           if (amount > 0) {
diff --git a/src/main/scala/li/cil/oc/server/component/traits/WorldInventoryAnalytics.scala b/src/main/scala/li/cil/oc/server/component/traits/WorldInventoryAnalytics.scala
index 5eb50d0a35..cc5d39706c 100644
--- a/src/main/scala/li/cil/oc/server/component/traits/WorldInventoryAnalytics.scala
+++ b/src/main/scala/li/cil/oc/server/component/traits/WorldInventoryAnalytics.scala
@@ -32,16 +32,28 @@ trait WorldInventoryAnalytics extends WorldAware with SideRestricted with Networ
     withInventory(facing, inventory => result(Option(inventory.getStackInSlot(args.checkSlot(inventory, 1))).fold(0)(_.getMaxStackSize)))
   }
 
-  @Callback(doc = """function(side:number, slotA:number, slotB:number):boolean -- Get whether the items in the two specified slots of the inventory on the specified side of the device are of the same type.""")
+  @Callback(doc = """function(side:number, slotA:number, slotB:number[, checkNBT:boolean=false]):boolean -- Get whether the items in the two specified slots of the inventory on the specified side of the device are of the same type.""")
   def compareStacks(context: Context, args: Arguments): Array[AnyRef] = {
     val facing = checkSideForAction(args, 0)
     withInventory(facing, inventory => {
       val stackA = inventory.getStackInSlot(args.checkSlot(inventory, 1))
       val stackB = inventory.getStackInSlot(args.checkSlot(inventory, 2))
-      result(stackA == stackB ||
-        (stackA != null && stackB != null &&
-          stackA.getItem == stackB.getItem &&
-          (!stackA.getHasSubtypes || stackA.getItemDamage == stackB.getItemDamage)))
+      result(stackA == stackB || InventoryUtils.haveSameItemType(stackA, stackB, args.optBoolean(3, false)))
+    })
+  }
+
+  @Callback(doc = """function(side:number, slot:number, dbAddress:string, dbSlot:number[, checkNBT:boolean=false]):boolean -- Compare an item in the specified slot in the inventory on the specified side with one in the database with the specified address.""")
+  def compareStackToDatabase(context: Context, args: Arguments): Array[AnyRef] = {
+    val facing = checkSideForAction(args, 0)
+    withInventory(facing, inventory => {
+      val slot = args.checkSlot(inventory, 1)
+      val dbAddress = args.checkString(2)
+      val stack = inventory.getStackInSlot(slot)
+      DatabaseAccess.withDatabase(node, dbAddress, database => {
+        val dbSlot = args.checkSlot(database.data, 3)
+        val dbStack = database.getStackInSlot(dbSlot)
+        result(InventoryUtils.haveSameItemType(stack, dbStack, args.optBoolean(4, false)))
+      })
     })
   }
 
diff --git a/src/main/scala/li/cil/oc/util/InventoryUtils.scala b/src/main/scala/li/cil/oc/util/InventoryUtils.scala
index e1e2c78fc3..3a570e1316 100644
--- a/src/main/scala/li/cil/oc/util/InventoryUtils.scala
+++ b/src/main/scala/li/cil/oc/util/InventoryUtils.scala
@@ -14,6 +14,17 @@ import net.minecraftforge.common.util.ForgeDirection
 import scala.collection.convert.WrapAsScala._
 
 object InventoryUtils {
+  /**
+   * Check if two item stacks are of equal type, ignoring the stack size.
+   * <p/>
+   * Optionally check for equality in NBT data.
+   */
+  def haveSameItemType(stackA: ItemStack, stackB: ItemStack, checkNBT: Boolean = false) =
+    stackA != null && stackB != null &&
+      stackA.getItem == stackB.getItem &&
+      (!stackA.getHasSubtypes || stackA.getItemDamage == stackB.getItemDamage) &&
+      (!checkNBT || ItemStack.areItemStackTagsEqual(stackA, stackB))
+
   /**
    * Retrieves an actual inventory implementation for a specified world coordinate.
    * <p/>
@@ -340,5 +351,4 @@ object InventoryUtils {
       entity
     case _ => null
   }
-
 }