I would say that Watt in his prime contributed to 3 extra wins for the Texans with his ability to not only control games but he was a turnover machine.
I had a bet with Nick Wagoner in 2015 that Watt would win MVP on defense he of course had Donald.
Watt won in a landslide.
You can't be the MVP on defense if you don't create turnovers.
Its never happened to my knowledge.
JJ Watt with the Txans
10-6
12-4
2-14
9-7
9-7
Donald with the Rams??
I would say the qb'ing between the two teams not a hellava lot of difference.
Keenum at the helm with both teams.
So I disagree with you a bit there.
Best,
Laram