Thats not how i understand it . I have both licences but chose to use my FAA as it means i dont have to do all the CAA nonsense of umpteen hrs of training ( for many people often conducted by pilots with far less experience in the aircraft themselves
) for each type rating and renewal .( Also your medical can last longer )
From April i think this year you will not be allowed to fly a G reg in the UK . Many paople are now moving their aircraft onto the N to keep legal . No doubt the Cretins Against Aviation will find some other way to put the final nail in the GA coffin ...hopefully by then i shall be so old i will fly anyway regardless