I haven't played either, but I own a J2 1x12 cab that was modeled on the EX. Actually the guy said he got the design from the non ER model and widened it out because he didn't want his rack to hang off the sides. He said he knew JB, sent him the design and the ER came out sometime later. Not sure that's verifiable.
Anyway, the cab sounds pretty dadgum good with my Thunderfunk plugged into it. It's got a 400W eminence delta and I don't miss any highs. Maybe it would "sparkle" more with a tweeter. I don't know. My last cab had a tweeter and I always had it turned off anyway.
But then again, my ears may not be that sophisticated. I'm sure there's someone on this board with better experience but sometimes I just can't stop myself from expressing an unfounded, unsubstantiated ignorant opinion.
