My personal favorite roof tiles is Monier Alabama. Tried and tested for over 30 years in Malaysia.
In 2005, the monier sales man offered us Nordica series (new product) at the same price as Alabama. We installed Nordica at 18 degree for a long shop office and it failed!! At the end, we went back to Alabama and it worked perfectly!
So we have not pledged our loyalty to Alabama for a long time to come!