Comparing Drew to Corbin is one of the most superficial comparisons I can think of. Drew is going to be a huge star when he gets promoted again (and the NXT run is going to help hugely) and so is Aleister Black. Pretty much everyone else in NXT is just a dude, but they got pretty lucky both of those guys came in when they did because the post Nakamura-era NXT largely revolved around a ton of nobodies and Bobby Roode's entrance music.
I mean, NXT has gotten quite good again, but I can't exactly imagine Roddy Strong, Adam Cole and ReDRagon on the main roster.