It is NOT as simple as:

FRP = bad
Polyurethane = good

There are many different ways to manufacture with either materials, and there are obviously many different levels of quality. Each has their place!

Here is a crash course if you are interested in really understanding composites.

http://downforce.biz/manual/df_tutorial.pdf


I hope this will help people who really want to understand some basics about the many different processes available.