Another update: I was able to bowl with both my IQ Tour and Devour on some 2nd squad THS conditions. I bowled on one lane, so I alternated frames throwing each ball. The IQ Tour is definitely stronger than the Devour, and both has the same smooth reaction. I was standing 20 board with the IQ Tour and 17 board with the Devour with my feet and had a 2 board difference at the foul line after a slight drift.
That 3 and 2 board difference may not sound like much for some people, but for someone that doesn't cover a lot of boards and not much hand...that is a big difference. It is an EXTREMELY rare feat whenever I get left of 20 board...even on the driest of conditions. Someone that has more hand and covers more boards, my guess would be that they will experience a more pronounced difference between the balls.
IMO, you can use them as a 1-2 punch with the same layouts and OOB surfaces. I thought about putting some polish on my Devour, but I think I am going let some lane shine develop first and see how that changes the reaction.