I went from B3e/H125 to 407. Hyd failure and FADEC failure in B3e/H125 are simple. Hyd failure isnt bad in 407 but FADEC failure in the 407 takes much more attention (new 407GXi is similar to B3e/H125 re the FADEC). B3e/H125 there isnt anything to do with a FADEC failure other than dont start it again until maintenance looks at it. B3e/H125 has no start temp limit. 407 below 150C. May need to motor the engine before start if you arent shut down long/its warm out. 407 smoother ride. 407 cockpit is much more cramped. Tail rotor authority is fine in the 407. Both about the same speed. You will miss the FLI in the B3e/H125 unless you are flying a 407GX or newer. I like them both, just depends on what you are doing with them.