ARs Ram and half have more vibration in my experience. They both draw similar if timed/synched properly.
I really liked the AR34 w/ R.5 cams I tried..very nice bow for the moolah..needs some Sims gear..but most bows do..You probably will end up paying about the same $ after you grab some Limbsavers and whatnot for the AR (since the Hoyt comes with them)
I really liked the AR grip..nicer than the Hoyt... for my hands at least.
I would get whichever one feels best to you.
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I do not seem to have a problem with vibration in my AR34 Ram & 1/2 that you report. MIne is dead in the hand, and the its smoothness is great. I prefer the Ram & 1/2 over the Ram cam.