Of couse AS350/355 SERIES ARE NOT ANY REWARDING AT THE TIME OF PUTTING THEM ON THE GROUND, but other than that the are easier to fly than Bells. After a few hours of work you can come out rather fresh from french stuff but very tired of keeping your eyes on TQ and TOT in 206's.
Regarding to 355N vs 355F's I found big differences at my job. Flying mountain and just about full weight, there's no sweat for a 355N
when we had to do the job with an F1/2 things where quite different for me
Great machine to do partial landings over stones and so on, nothing to do with 206,s. Just my thoughts after 12 years flying them.
Buen vuelo