If you're a low time pilot, or inexperienced on JetRangers, then a checkout on an A model if you've not flown one before is a must.
A company I do ad-hoc work for had to lease in a 206. Only one available was an A model and I had to get checked out on it specifically before flying it. It turned out to be the hottest day of the year as well, so an A model which hits the TOT limit first, not a torque limit, was interesting.
What did I learn, both from the checkout and the day's flying ? Don't have loads of fuel, make sure the ground staff load pax to a MAUM well below the max authorised for the a/c (in this case MAUM is 3000 lb, I kept it with 25 USG and asked for a max of 2800lbs max). Worked a treat.