I don't know if you can really even see the difference since the angle of the "Then" pic is awful (he was still skittish and we couldn't get a straight on shot of him), but can you see the difference between Zonie when we rescued him, and today?
Things I noticed are thicker legs, chest, and butt. Neck too, but you can't see his neck well.
The only difference I really see is that in the more recent pictures, your horse looks slightly more filled in. Hard to tell because of the angles and the lighting. You have a stunning horse by the way :)
Well the 'then' picks show a pretty decent looking horse anyway. Certainly doesn't look thin there. The now shots show a pretty good looking horse too I wouldn't consider him to be too podgy - perhaps a tad overweight is all.
His front feet look like they have longish, underslung heels tho. I'd be wanting to get them into shape.