I to see nothing rude in Smrobs post, lets see..
At 19th months it is hard to say for sure, colts go through all sorts of stages as they develop, there are times that they look spectacular, ther eare times you wish you had a horse sized paper bag to hide them in because they are just fugly. So all you can say from one pic is he looks like himself, and that he looks like a colt, who knows where he is on his road yet?
Second an honest assessment of the difference in build between the two pics.
Third, the advice that we all should follow, love your horse for what he is, don't try and make him into something he isn't.
So what if the colt doesn't look like Doc Bar? Doesn't make him any less than he is