OP, I haven't heard the EV driver you're asking about. I previously owned a Diesel 215 loaded with the 200 watt EVM's and liked the tone. I haven't heard the 400 watt versions of the EVM's but I've read on TB that they're darker than the 200 watters.
Thanks for the info. You wouldn't happen to know if the darker sound is a byproduct of the higher wattage rating or if it's just caused by a design difference, would you?