Perhaps I can extend this debate into the rotary arena. Things now seem to get a bit more comlpicated. The UK / JAR (H) is type specific whereas the FAA (H) isn't. Here there is a real advantage of having a full FAA PPL as the restricted only allows you to fly to the privileges of the UK / JAR ratings - in other words type specific.
No point then in having a restricted FAA (H) in the U.K so gaining the unrestricted is the obvious route. Now comes the cost. I am advised that I need 10 hours - 15 hours of dual (thats nearly half of my original rotary course) to convert to Uncle Sams way of doing things. I then have £350 flight test fee and if i do this in the U.K I also have travel costs to pay. I suspect I would be better off getting a new type on my UK licence.