About where I am. The OP's rage against WAR ignores the fact that it ranks Trout and Betts very close together and presumably includes all five tools: catch, throw, run the bases, hit, and hit with power.
Here are some things that might be in Trout's favor:
10 vs. 11 Mookie stolen bases, but 0 CS while Mookie has been caught twice.
3 outfield assists vs. Mookie 2.
If you believe all the stuff about how valuable JBJ's defense is, part of that assumes centerfield is tougher than right field.
Mookie is part of a very good offense and Trout isn't, so Trout gets walked a lot.
Trout is bigger: 6'2" vs. 5'9"
Mookie has the green monster, which presumably is good for a righty hitter. He has more than twice as many doubles as Trout.
I think both are very good and am delighted one of them plays every day for the Sox. I did see an article online in espn that torqued me, however, because it says Trout could be having the greatest season--using WAR as the measuring rod--in the history of MLB and makes zero mention of Mookie whose WAR is 3.6 to Trout's 3.9.