To say the R66 is the Nissan of helis and the 120 is the BMW of helis is just wrong. When comparing a Nisson and BMW automobile, you could state the BMW handles better, rides better, is quieter, has far better performance and so on.
You simply cannot equate those facts to the R66 vs 120 comparison. Fly both ships, THEN make the comparisons.
IMO, the R66 far and away exceeds the 120 in nearly every category, save looks. The 120 is gorgeous and the R66 looks like a tadpole or sperm.
There is a distinct reason the 120 barely sells and the R66 has a long back order:
The R66 is clearly the better ship. There really is no comparison.
PS
I'm a 120 fan.