While the general rules of helicopter aerodynamics apply to both helicopters, you will find the feel of each different from the other. I learned in the 300 then did a transition into the R44. While the engine control was easier due to the governor, the controls gave me conflicting signals in the area of feel due to the angle of the handgrip. Also the sensitivity of the controls was quite apparent. Besides the 300, I have time in the BH206, BH212, AS350, R22 and BH47. Based on my observations and experiences, I do not like the 22 or 44. They do not fly like any other helicopter out there. I think you will find these machines will take you more time to transition into that you think.