What's the story on this?
Is it a better version?
E definitely has map updates compared to C (the only other version I've tried). Local roads in newer subdivisions in my area are way better filled in. It also added Alaska and Hawaii (which I'm pretty sure weren't there in C).
I didn't notice any obvious software changes; not to say there were any - but nothing jumped out at me.
I haven't gone looking at POI details to see what's different (and don't specifically recall issues from C to look at); but if the maps are updated then there are probably some POI updates as well.
-Jeff