In most Hollywood post production studios the sound libraries they have access to and probably the first helicopter sound bytes returned by the software query (startup, inside, outside, turn-off, etc) come from a trusty JetBanger, except when it dives in which case it sounds like a Stuka.
Back to topic. I'm not an operator just a user.
R44: If your tall and don't have little short feet your right foot will be angled inwards which becomes uncomfortable. T-bar cyclic is hard to love.
BIII: If your tall your head may touch the overhead, also high skids are nicer. Front seat is crap but can be replaced with aftermarket ones. Not sure if install/removing pax side pedals still needs to be performed by licensed engineer.
Prefer the BIII anytime money isn't an issue, unfortunately most pax think they are much the same thing.