My wife has a CrashGuard and I have a PlayProof. Now, to be clear, we don't have an E2E protector on either phone right now, but from what I see/feel, the PlayProof is stiffer and tighter than the CrashGuard. My guess is that the CrashGuard would play nicer with an E2E protector. Only a guess though.What do you mean by more give?
I dont have the PlayProof, but from multiple youtube videos, it "looks" as though the PlayProof doesn't have an as aggressive lip as the CrashGuard, i.e. it doesn't go over much of the curved glass. I may be wrong?