diff --git a/src/Column/AbstractColumn.php b/src/Column/AbstractColumn.php
index 61aa526..c6cdb17 100644
--- a/src/Column/AbstractColumn.php
+++ b/src/Column/AbstractColumn.php
@@ -535,4 +535,35 @@ public function setComment($comment)
      * DBMS-specific implementation for setting a column comment
      **/
     abstract protected function _setComment();
+
+    /**
+     * Compare with given specification
+     *
+     * @param mixed[] $newSpec Specification to compare with. Same keys as toArray() output.
+     * @param string[] $keys Compare only given attributes (default: compare all)
+     * @return bool
+     */
+    public function isDifferent(array $newSpec, array $keys = null)
+    {
+        $oldSpec = $this->toArray();
+        if ($keys) {
+            $keys = array_flip($keys);
+            $oldSpec = array_intersect_key($oldSpec, $keys);
+            $newSpec = array_intersect_key($newSpec, $keys);
+        }
+        return $this->_isDifferent($oldSpec, $newSpec);
+    }
+
+    /**
+     * Compare specifications
+     *
+     * DBMS may require extending this method with tweaks for emulated types.
+     *
+     * @param mixed[] $oldSpec
+     * @param mixed[] $newSpec
+     **/
+    protected function _isDifferent($oldSpec, $newSpec)
+    {
+        return $newSpec != $oldSpec;
+    }
 }
diff --git a/src/Column/Mysql.php b/src/Column/Mysql.php
index 9a04cbb..0ac81e5 100644
--- a/src/Column/Mysql.php
+++ b/src/Column/Mysql.php
@@ -194,4 +194,21 @@ protected function _setComment()
     {
         $this->_modify();
     }
+
+    /** {@inheritdoc} */
+    protected function _isDifferent($oldSpec, $newSpec)
+    {
+        if (
+            array_key_exists('type', $newSpec) and
+            $newSpec['type'] == self::TYPE_BOOL and
+            $oldSpec['type'] == self::TYPE_INTEGER
+        ) {
+            // Booleans are detected as 8 bit INTEGER.
+            $newSpec['type'] = self::TYPE_INTEGER;
+            if (array_key_exists('length', $newSpec)) {
+                $newSpec['length'] = 8;
+            }
+        }
+        return parent::_isDifferent($oldSpec, $newSpec);
+    }
 }
diff --git a/src/Column/Sqlite.php b/src/Column/Sqlite.php
index 7c26f4a..5d436c8 100644
--- a/src/Column/Sqlite.php
+++ b/src/Column/Sqlite.php
@@ -158,4 +158,43 @@ protected function _setComment()
     {
         // Columnn comments are not supported by SQLite.
     }
+
+    /** {@inheritdoc} */
+    protected function _isDifferent($oldSpec, $newSpec)
+    {
+        if (array_key_exists('type', $newSpec)) {
+            $oldType = $oldSpec['type'];
+            $newType = $newSpec['type'];
+            if (
+                $oldType == self::TYPE_INTEGER and
+                $newType == self::TYPE_INTEGER and
+                array_key_exists('length', $newSpec)
+            ) {
+                // Integers always have length set to NULL.
+                $newSpec['length'] = null;
+            } elseif (
+                $oldType == self::TYPE_INTEGER and
+                $newType == self::TYPE_BOOL
+            ) {
+                // Booleans are detected as INTEGER.
+                $newSpec['type'] = self::TYPE_INTEGER;
+            } elseif (
+                $oldType == self::TYPE_CLOB and
+                ($newType == self::TYPE_TIMESTAMP or $newType == self::TYPE_DATE)
+            ) {
+                // Timestamps and dates are detected as CLOB.
+                $newSpec['type'] = self::TYPE_CLOB;
+            } elseif (
+                $oldType == self::TYPE_FLOAT and
+                $newType == self::TYPE_DECIMAL
+            ) {
+                // Decimals are detected as FLOAT.
+                $newSpec['type'] = self::TYPE_FLOAT;
+                if (array_key_exists('length', $newSpec)) {
+                    $newSpec['length'] = null;
+                }
+            }
+        }
+        return parent::_isDifferent($oldSpec, $newSpec);
+    }
 }