How does the battery life compare? That is the most important factor to me.
Battery life is actually better for me on GB rooted and deodexed than it was on liberty 1.5, but just by a SMIDGE. We're talking an hour on moderate to heavy use and 4-5 hours additional on light use.
If I were you I'd just go with GB for now, and sbf back to .340 and wait for public release of liberty 2.0 reviews to hit to see if it has massive enough improvements to trump GB for now. Until then, me personally I'm waiting for a blurless bloatless rom for GB soon.