Marrs and McFarland are not even the same position type.
Marrs is a 6'11 guy that runs and jumps like he's 6'4.....super lean frame. He's more of a wing Forward, High post distributor type.
I watched him defend at the top of the key and move around like a guard.
He had some back problems (the way a lot of guys who grow to be that big do) and he's really not even gotten to play all that much basketball. I don't like to play the IF game, but IF he had stayed healthy his first 3 years of High School he'd be a top 50 player in the country.
He reminds me of those awesome tall Wing Forward guys that Wichita State had during their Final 4 runs. He can defend well inside, he can score inside.....but hes not gonna sit on the low post all game like a McFarland.