Wyd4
Headphoneus Supremus
You could PM @Wyd4 about this, I believe he's heard both. Myself only 325e.
Generally the 'e' series to me in general sounds a bit more mainstream.
Not in a bad way, well I like it, Grado purists would disagree probably.
They are still definately Grado all over, but a little smoother and more forgiving of source/tracks etc. A little less agressive.
Its a good move really, I think they will sell more headphones leaning this way and personally I would lvoe to see them still around in another 30 years.