The 300 and 400 have indeed a common type-rating, but both airplanes are completly different......flightdeck, engines, aerodynamics
For every power changes on the 400, you have to trim the rudder, the 300 is not so sensitive regarding power changes.
Landing the 300 and 400, you could write a book about that, a good way of doing it, is to start the flair at 10' for the 300 and 20' for the 400. Especially on the 400, make only small power changes, becaus those props give a lot of thrust, but also a lot of drag(idle) and I don't have to explain what happens if you have put idle power if your flairing at 30' above the runway. You WILL come down, and you won't get an applause from your passengers.
But once you have find out to do it wright, it's not that difficult.....and every landing you can walk away is a good one, isn't it?
