By size do you just mean "beefier"?
Curry is 6'2 (allegedly)
LeBron is 6'9
Embiid is 7'0
KD is 7'0
Greek is 7'0
Magic is 6'9
Kobe is 6'7
Jordan is 6'6
Bird is 6'9
Shaq is 7'1 or 7'2 depending on what day you ask him.
Curry and Magic are the only players on here who weren't All-D at some point in their careers.
So the old era has only one 7 footer in Shaq, who isn't a speedster either by any means. It would probably be harder for him to play defense.
Magic, Kobe, and Jordan were not exactly known for their outside shots, for Magic, he was just starting to get the hang of hitting them before HIV hit.... Shaq obviously didn't shoot threes, but no one is asking him too, and the same would apply to Greek, even though he does shoot threes. Almost feel like you have Shaq on Greek and let him shoot his poor jumper.
Idk, the matchups are gonna be weird for both sides.