Drake had a built in tv fanbase, then linked up and snatched the Wayne/ Young Money fanbase....then went after the female fanbase... plus has arguably the best management ever (HipHop) and has proven that he can put out pop hits.
Jay is obviously much nicer on the mic but he definitely doesnt have all that going for him so probably wouldnt sell crazy. Still, hopefully he does drop something nice. Dudes flow is refreshing.