I have only seen very little information about comparison of aluminum factory hardtop vs. fiberglass one (
http://www.gtmotorsport.net/index.php?menu=Boxster+Street&page=Hardtop) . I am planning on getting hardtop soon for DE events and Track because I don’t want to get KB roll bar extension to pass broom test since in few years I will prepare my car for BSR. So I would like to know which one is lighter, incase of accident how would each behave, and anything else that someone might know?