Everyone is talking about the “chin”, the bottom bezel. It does look thicker than the top bezel, so the phone may not be perfectly symmetrical.
The selfie camera has a bezel of its own, which eats into the usable space on the top row.
A related rumor mentions that the Galaxy S10 will come in solid colors, no gradients here. However, it won’t be a plain paint job but will have luster (perhaps a special coating?).