Removable battery, SIM and micro SD. Both devices have great features, but simply being able to remove/replace the battery could swing things in the SIII's favor. Hopefully, the 2100 mAh is enough to keep the SIII going for a full day of fairly heavy use. But, if not, I'm sure Seidio and others will have something available to help with the situation very soon. Carrying a charger around in my pocket isn't very comfortable. I think HTC dropped the ball on that issue. Too bad.