206 / 407 - completely different animals.
Most of us flew the 206 first, but that is not a valid reason to do it that way- not much of anything translates from the 206 to the 407.
If you are coming from a piston helicopter, just remember one thing: Watch your torque gauge on EVERY take-off....you can continue to raise collective in the 407 beyond 100% and massively over-torque the sucker (lots and lots of $$$) without ever getting an rpm decrease/rotor droop- the aircraft gives you no kinesthetic indication whatsoever that you are destroying its guts (other than a little blinking light on the panel). Have fun