I have both, and I think the E7 sounds better. When I use my E5, it adds a slight veiling to the sound, imo. There's also 3 levels of bass boost on the E7. I won the E7, but I think it's worth the money. That's one thing I like about FiiO. Perhaps they don't make the best stuff on the planet, but it's good, and they don't try to rob you price wise.