Have a look at
this AAIB report, with particular reference to licence issues raised.
The PA46 in EASA land has its own type rating
shown here. Hence, if what the AAIB suggest in their report is true, then you may need to put the PA46 on your EASA licence first.
I would boldly suggest that the easiest route around this potential issue (nb - I don't believe the AAIB solved it either way!) would be to get a standalone FAA PPL/IR...