Wharton went to Palace in the Feb for £18M and we spent £40M on Gray a few months later. Wharton is 3 years older. Only time will tell who will be better.We were certainly in discussion with Wharton him when at Blackburn, but he decided to go to Palace, possibly because of assured playing time.
And from his POV not a bad decision, although its pure speculation as to how much game time he's have got at Spurs in competition with the likes of Bentancur and Bissouma one of whom he might have supplanted.