Never used the xlab gorilla (and I don’t think I ever since it appears to be $50/cage)
The Bontrager RL tri cage has worked well for me, though. Never ejected a bottle.
http://www.bontrager.com/model/07846
Stop… just stop. Don’t take this advice… You are a n=1
Sorry but the RL cage is flimsy and not intended for use outside of the frame. Great cage for that but not for much else. I have horror stories about launched bottles and ruined races because of it.
Switched to Gorilla BTA and Gorilla XT behind the saddle. GOLD. STANDARD. Nothing else compares.
EDIT: Don’t be like me and spend $5k+ on the top of the line Trek SC with fancy race wheels and then penny pinch $60 (difference between 2 cheap cages vs 2 gorilla cages)… to then have your B race ruined because of launched bottles and dehydration. Seriously, just spend the money.