Ive considered it myself, but I think it's unlikely - Russel never put up those kinds of dominant all around numbers in college (23/6/6) and I dont then anybody ever saw much defensive upside in him - plus different attitudes, with Fultz being very much a pro's pro.
I do see Russell as the floor for Fulrz, and to be honest I'm ok with that. Russell is a very talented player and is already putting up very impressive numbers in this league, and it wouldn't hurt us to have a D'Angelo Russell calibre scorer giving us an offensive boost off the bench as our 6th man. It's not optimal from your #1 pick, but id that's the absolute worst case for Fultz (which I believe it is) then I can certainly livev with that. Russell still has a lot of upside and could still become an all star 2-3 years from now if he can get his head in the right place.
Russell stats - freshman year in college
19/6/5 . 41 percent from 3 and 75 percent from the FT line
So yes he did put up similar numbers give and take.
I don't think you can really say "similar numbers, give and take."
Look at it as percent difference:
Markelle Fultz D'Angelo Russell
6'4", 195 lbs. 6'10" wingspan 6'5", 180 lbs. 6'9" wingspan
PPG +20% PPG -17%
FG% +6% FG% -5.6%
3P% +0.5% 3P% . -0.5 %
FT% -14% FT% +16%
RPG +0% RPG +0%
AST +18% AST -15%
STL +0% STL +0%
BLK +300% BLK -75%
TOV +10% TOV -9%
Those look a lot better than Russell's. Can't sneeze at 300% more blocks, 20% more points, and 18 % more assists.