I flew the 200/300 and Q400 at flybe and it really was no drama. I remember the initial Q400s had its EFIS PFD set up in the old style with on-screen dials instead of speed tapes for commonality. As said previousy the performance was a constant reminder that you were Q400ing, and of course a complete glass cockpit! Its actually a bit more difficult with the airbus 319/320/321 where you have to constantly remind yourself which one youre in!