Really? Looks like the same man to me.

Start with the chin: approximately same dimensions (though the shading makes it a little hard to tell). The skin is looser but there isn't a tight collar, so that's that.

Go to his mouth; lips form pretty much same shape in the smile, teeth look pretty much spot on too. Corner "dimples" look a little different but not really that much, same dimensions, just him looking a bit older.

The lower jaw skin folds twice, in approximately the same spots and in the same way.

Now his nose: Same dimensions, same hook, even same light wrinkle/possible scarring along the top. The corners of his nose are especially similar.

Then his ears: pretty much the same folds and dimensions. Then we go to eye area: The creases in the corners are about the same, albiet more numerous and slightly droopier, as would be expected with age and without extensive makeup. The eye bags themselves are identical in shape and size between both pictures.

Eyebrows appear to be the exact same shape and dimensions, as well.

Here's one of the big kickers: You can see the crease marks between his eyebrows; they have a very distinct shape and position, and that matches perfectly between both images (more pronounced in the left one, obviously, because less makeup and more age).

Hairline, from what we can see of it (above ears, mainly) is pretty much same. Hat hair to be sure, but line and general flow is almost the same precisely.

Skull shape (as seen by shading in the forehead in particular) is spot on.

There is not a single facial feature that doesn't match that can't be easily explained by age or makeup. They are the same man; the biggest thing going on here is that the left side Trump isn't absolutely plastered with makeup and just got done with a hard day's exercise.