both fones r the best
E6 has CMOS camera, touch screen, uses Linux as os, u can use cam as web cam too
W 580i good cam with mp, Walkman series so good sound, cam clarity is also better
if u r going to do some experiments with phone go for E6 otherwise Switch to W 580i
i dont know price index for both
I have W580 and my Brother user E6.
1. E6 has GPRS whereas W580 has EDGE. Even if you mod E6, you wont get speeds as high as in W580(I get as high as 22KB/s sometimes)
2. Display of W580 is crystal clear whereas that of E6 is very dull.
3. Sound Quality : No comments
4. battery life : E6
5. looks and style : W580
6. Camera : W580