As far as I know, all the same. All the Eclipse grips will fit on all the frames, Ego06, 05, E2 and E1. Likewise with the Hybrid grips, although take care with screw depth.
my ego grips will not fit on my nexus e1, holes in the right place but you will have to hollow the back out of the grips to get them to screw up flush, not worth the hassle to be honest
Onw rod of advice be craful as the hybrid's especially on the egos are thinner, be carful not to screw up to tigh, other wise youwill shoot straight through the solenoid.
I'm in the process of fitting a STAR frame to an evo cocker body. It's a bit of work and not for the feint hearted. You will need to line up the front screw hole of the star frame with the body and machine off the rest that protrudes forward (the STAR frame is longer at the front than an E1/E2 frame) to get it to fit. You can get it all to fit if you have an MQ valve.
Here's strawbs effort:
<img src="http://img.photobucket.com/albums/v637/davejeff66/StrawbsMutant.jpg" alt="Image hosting by Photobucket">
...which is nice, but mine (when it's eventually finished) will be even better.