We have stayed at both hotels. Both are good depending on what your'e wanting in decor. The RPM has recently changed to a very purple hotel, and there is still some reno's on going. the RPRM is still the elegant white and wrought iron. I think the service and the restaurants are almost identical at both. Riu Palace Mexico *RPM* is closer to the disco *right across the street for dancing* while the RIU Palace Riviera Maya is closer walk to downtown Playa Del Carmen. The newly renovated rooms at he RPM appear to be much smaller than the rooms at the RPRM. If given the choice to return, either of the hotels are nice and the food is good at both. As per wedding,,,,,,be careful as they are not like having a wedding in Canada,,,they do not pay attention to details unless you are willing to over pay.