I seem to hear more sizzle in the EL34, and I'm more of an EL34 guy anyway. I've wanted the 50 watt EL34 version, but now that it's come to fruition, I'm on the fence.
I've never played a 100 watt EVH, which is probably a different animal. I've owned the 50 watt multiple times, and each time, I asked myself what the fuss was. It just sounds stiff on the blue channel, no character, and red is too compressed for my tastes. I did get great tones last go around with some NOS tubes, but, they just don't inspire me.