Without sounding repetitive, it really depends on the group and your knowledge of the FP. With the exact same char, and mostly the same gear (some Tionese, some Recruit, 1 Columi piece, BM Saber) I've breezed through every HM FP but also had repetitive hard wipes on SM EV (Gharj, DAMN YOU!!) so it just depends. For me, HM FPs are typically easier ( I said it) because of the smaller group size. However, if you have a decent guild group (i.e., you can communicate with on Vent, Mumble, etc.) that know the mechanics of the various Ops, you can walk through those too.
Like has been said before, I'd rather have a teammate that knows every in and out of the fight in full Recruit than a complete moron in full Rakata.