The front legs should be slightly less bent. My mistake

Also forgot to mention longer muzzle

A comparison between pony and dragon version of a pony. In this case twilight sparkle come to help us highlight the main differences.

One might think that the dragon form is too limiting in personalization, but I beg to differ. You can change the crests shape and colors, as I've shown in the mane 6 and princesses case, both on the spine crest and the cheek ones. You can also be creative with the scales going all along the body (like for princess cadence the yellow bits are diamond shaped and the blues of the scale sections vary in many different shades of teal)