It has a slightly faster processor and larger cmos, yes (not that the latter matters much). but you can no longer swap batteries and mem cards like you could on previous models.
The "edge", well.. depends on if you think that's neat or not. The side screen allows for context-sensitive hot buttons and face-down notifications (who the hell keeps their phone face down anyway?), but its also another potential point-of-failure in an impact, and the phone as a whole is more susceptible to bend damage because of it.