I was Captain on a J32 and also a Line training Captain on the BN2A Trislander. OK the latter was a class rating and ironicly more difficult to fly with 3 noise generating units and you did it on your own with no 'kit' on board.
Fortunately the company owned them all so no problem there.
Someone once told me that the CAA said you could be current on two types (JAR25) but I don't actually know.
