I will write my opinion, based on my knowledge as an outsider.
Keep in mind, what i know are mostly from what i read on this external forum.
I think for now, i will say sabre will win.
Basing on the fact they are most likely a pretty solid tribe as they are a group that broke off from MvDC.
If they stood up against the MvDC leadership and broke off and successfully established themselves, thats no easy feat. Even in IT none had done that.
That could mean that the guys who broke off from MvDC and challenged them were determined and bold. If the reason for breaking off from MvDC was to consolidate their assets and make a better war front against gents that is and not to escape/run away from the war.
BugZ/BugZz on the other hand, from what i know from waterloo's post seemed like an untested bunch of players who survived through kirk's diplomacy. This is especially true from the post by gents' players about that skype group chat involving the leadership of the 3 tribes(IT/Gents/Bugz).
don't flame me for saying 'untested' i merely meant that bugz has not yet gone off to war where they totally dominated and annihilated their opposition through offensive OPs and not just defending like turtles and stacking frontlines and waiting for the opposition to get tired.
But i don't know most of the stuff that's been going on, i don't think ive ever read anything in this forum before the Echo/gents war and IT/gents war.