Yes, the Jetranger and Robbo TR power do differ - I've flown most of my hours in the R22 with a few latterly in the 206 and I am always being ranted at for not using enough boot. Pull in power on a Robbo, a little bit of left pedal and you're happy, pull in power on a Jetranger, a little bit of left pedal and you've got the Instructor sitting in your lap shouting 'look at the bl**dy ball!'