What's the better roof?

tinkerer wrote:
Not taking sides here but my motorhome is 11 years old with a rubber roof and it looks like new. But I clean it with the proper cleaner and put on the treatment once a year.

IMHO, you're in the sweet spot. Somewhere between 10-15 years (depending on how well you take care of it) there are no worries. Then all of a sudden crazing will appear, maybe even enough shrinkage where things pull away from their fasteners. Dicor and rubber roof paint to the rescue for another 5-10 years of trouble free service.