Krell 302 v 302e

I've got an ARC CD5, LS26, a Krell 2250 and Wilson Sophia 2. I was looking to upgrade the power amp to a 302e but an opportunity to buy the original 302 has come up.

I've heard a 302e with Sophia 3 and loved the sound. Is there much difference to the 302 other than the energy efficient standby mode ?