Finally tired it, works out £150 more expensive and crap flight times (only one option) via the USA site
Like I say on above comment mate I’ve only tried on UK ones, hopefully helps someone
Tried it for a hotel in Portugal and it worked out more expensive
It’s only UK hotels I have looked at Nate so possibly not the same for overseas hotels by the sound of it
Maybe works for US stuff, but just compared price on Bermuda hotel I want and it was £3,229 vs $5180 (=£3,889), so UK site cheaper by £660 for this.