I found this picture, hope it could help you.
Subjectively I would say that EH curve is really noticeably flatter and I'm happy with my setup Carbospeed + RZ EH for hard smashing. It's a quite hard setup and I was surprised I still can lift up the ball from the floor easily. I played LP before, so it fits me perfectly. It's probably because the spin ability of RZ EH is very close to RZ.
Somewhere I found that RZ uncut weight is 74 grams, RZ EH 76 grams.
If you don't like RZ, you still could love RZ EH, I think. I'm sure it's worth to try, but the blade would matter.