Dylan and Cole have many differances in appearance and in personality, even though they are twins. They have much changed over the years, so some of the differances that they once had, or not visable now. The ones listed below are the differances in appearance that are most visable. These are the keys to telling Dylan and Cole apart.
One of the MAIN keys to telling the twins apart, are Cole's moles. He has moles on both sides of his face so it is easy to tell no matter which way he is facing.

Dylan and Cole are changing ALOT. Before their face shpaes used to be different, actually opposite. Now it looks more like Cole has the more oval shaped head. Dylan's build is bigger than coles, so this contribute to the head shape.. Cole>LEFT Dylan>RIGHT

Cole's scar was more visable when he was younger, but you can still see it now. I chose this picture so you can see it more clearly. The scar is on the right side of his face.
Dylan on the other hand, has a discolored skin mark on the left side of his face. It again was more visable when he was around 9-12 but it is getting harder to see.

These 2 pictures show the differance is Dylan and Cole's smile. You can see that Cole's smile is more slanted it goes curvy. If you look in pictures now, you can not see that as much, but it still is visable. Cole>LEFT Dylan>RIGHT

You never know who is taller than the other.. they change everyday! One day Cole will be taller than dylan and the next week, Dylan will be taller than Cole!

Dylan and Cole have a differance in Build as well. (Body Build). Dylan has a larger frame, as Cole has a smaller one. Dylan has always had the bigger frame. If you look at younger pictures, you can see that he had broader shoulders.

Just like Cole has moles, so does Dylan. Dylan has a 3 more visable ones. One above his lip, one on his chin, and one on his neck. There are more, but these 3 are the most visable to the eye;)