Phew! In theory all EASA authorities should apply the same standards. Historically, Germany has sometimes been problematical with medical confidentiality if you need to move on at some time in the future (reluctance to pass info on). From my own experience some years ago, I found it helpful to work with an Anglophone country, hence RoI. I have no insight into acquiring EASA licence on the basis of FAA, I'm afraid.
Hth
Edited to add that I believe that the authority issuing the licence should also be where the initial medical is issued, so he'd be choosing a NAA for any ground exams/flying training/skills test as well as just an initial. Disclaimer - this is based on my own experience gaining a licence on SOLI UK to RoI, regaining a UK national licence and assisting other nationalities with changing licences. You should certainly do your own research on this!
Good luck
Last edited by deltahotel; 19th February 2026 at 16:30.