i dont think it had that much extra wire, maybe a few hundred extra turns. a typical paf type bobbin might have 5000 turns of wire, adding 250 more would be noticable, adding 500 would change things are fair amount. there is a custom shop version of the pearly gates that is overwound compared to the production verion that ive heard is fatter and has a little more output.
the pg+ doesnt sound much like a pg to me but thats more to do with the a5 as dave mentioned