Originally Posted by
Luxetravels
The Amex amenity is the same as that of a preferred partner (providing they offer the 4th night free) so you can choose either route.
PP amenity is breakfast, upgrade if avail, lunch once during stay....
Not 100% true, although mostly so. I know of one exception (although it won't affect these folks most likely): on a suite booking, FSPP gets free internet and FHR doesn't. So that implies it is possible there are other differences.