I vote ES. I've never had the Prothane chassis bushings, but I've had both the Energy motor mounts (in my 98 FoDo) and the Prothane motor mounts (in my current CRX), and the Energy motor mount bushings fit MUCH better. The Energy's slid right in with zero problems, and I had to sand/grind/cut the fuck ouit of the prothanes to get them to fit.
I had the Energy chassis bushings in my EG hatch, and they kicked ass.
+1 for ES