Sean, I use it in all critical joints (A joint, joint rings, pins, shaft inserts, coring, and butt sleeve).
I think it is stronger but can offer no evidence of that.
I know it sets up very hard and conducts vibrations better than some softer setting epoxys. Less dampining equals stronger feedback ... IMHO.
I use West system three (quick cure 5) in butt caps, inlays, ferrules (threaded) and other places that I dont think would effect the feel of the cue.
Just a preference I guess.