I'm not sure any non-raps fan would say they'd take Ross over Drummond right now. Ross hasn't shown any signs of being an above average wing, though it's still very early. Drummond has shown signs he could be a very good post, through sheer athleticism alone it's hard to imagine he won't match a Deandre Jordan level career.
Both guys are very raw, but I honestly believe every GM in the league would take Drummond if we could do our pick over. This isn't to say Drummond will for sure develop, and Ross will never put it all together, but to say Ross is still the right pick right now is tough to justify.