Rozier's listed weight is only slightly heavier, but he's also shorter - *and hence thicker. Rozier had trouble guarding LeBron - and most players do anyway - besides LeBron, Rozier is generally decently switchy on wings due to his length. In contrast, at this point SGA looks too thin to switch on to most anybody, and has narrow shoulders...
But yea, if this kid can fill out his body that'd be great. Don't wanna be like Ingram, 6'10 playing like he's 6'6 because of lack of thickness.