HTC Touch Pro (CDMA)

I have owned this Touch pro for a few weeks now on Sprint to test and see if I want to get it with Verizon (my current provider). I notice that the battery life (on Sprint network) sucks when signal is weak. In my office I get almost no Sprint bars with the TouchPro, but my VZ i760 never had an issue. So needless to say, at the end of a work day, the TouchPro is pretty much dead, my i760 is rocking on with plenty of juice. So my question is if I get the Touch Pro on Verizon, and it accesses the stronger VZ network, what kind of battery life improvement will I see?

Anyone who gets this phone on VZW, please report back your battery experiences.

Thanks,
--E