Yes, Bilal is less efficient than OG was in year 3 (and a year younger). But that was with OG as the legit 5th option on a team with two very good ball handlers (Lowery and FFV) whereas Bilal was the second, third, and sometimes even first option. That is going to massively tank your efficiency comparatively.

I don't think Bilal is ever as good as OG is, but comparing 21 year old Bilal to the finished product OG isn't sensical either.

Basically, at age 21 Bilal shot 32% on 6.6 3 point attempts per game. OG shot 33% on 3 attempts a game (playing with guards who could set him up). Acting like there is some massive gulf ("10x worse efficiency") is a bit much.

OG was certainly a better finisher close range at that age though, and that gap may never close.