16/17 Wanyama compared to 18/19 Rice
Tackles made: 90. Rice made 98.
Interceptions: 40. Rice made 52.
Recoveries: 242. Rice made 287.
That's just a taster .. overall their defensive stats are very similar with Rice edging some, Wanyama others like duels won. They really aren't all that far apart on either the defensive or offensive side of things, certainly not enough for you to say it 'isn't even close'. Obviously you'd expect Rice to make more tackles, interceptions etc because he plays in a weaker side which has less of the ball, but overall the story is that both provide a real defensive bite but not much going forward. I'd take Wanyama 16/17 over Rice 18/19 but the gap isn't that big, you just don't seem to like Rice.
Rice is also 20 and already starting regularly for a decent PL side for a reason. And he's doing a good job, the stats support that, and there's a reason he is getting in the England side. The staff at England and West Ham aren't just playing him for the kicks. Anyway, my original point is that there's still a place in the game for a limited defensive midfielder/anchor who can play behind more technical players.
Rice will only get better and better in that DM role as he matures. Right now people are talking about him being too hasty to close down/win the ball, but the maturity/understanding of when to go to win it and when to back off will come with age.