Heh.
I have a G3 Artemis with extra melee damage and extra damage protection (got it from a shop - not mad enough to engineer that stuff.)
Artemis + extra melee damage, wow, you gonna look like in Kill Bill or Matrix
I cannot legally recommend this in PvP but personally I like the idea of being creative

Honestly, I never tried anything else than the Dominator in PvP.
Most of CMDRs had Dominator, a little few Maverick and almost none Artemis.
Actually I just checked in-game and in the fandom, it seems to me that the specs of each suit are not complete. I heard some other attributes have variations (like the jetpack capacity) but I'm not sure.
I just did some tests in-game, I'm very disappointed, the movement speed is the same for the 3 suits
So I would say Dominator have the clear advantage here because of better shield. But you probably already know that, hehe.
Edit : I would rather go "DMG resistance + Shield Regen"