You made a long post about the least popular type of gun, the AEP. People just don't feel strongly enough about them, as they're such a limited platform. My understanding is that the SSE18 is a tad snappier due to MOSFET and better bearings, but I'm pretty sure it's still going to shoot 220 on a 0.20g, just like all the rest.
If you're having fun fiddling with them, crack on. That's 65% of the hobby anyway.