Motorola KRZR K1m

I apologize in advance if this was already discussed. I am switching from VZW to Sprint. How do the KRZRs compare from opposing providers? I know there has to be some differences due to the lame slow VZW software vs. the original Moto software on Sprints.

Is there a difference in...
- Battery Life
- Navigation Speed
- Reception (in equal area)

Thanks