I've been reading several articles and write ups from industry and it seems that Acrylic is better, below are a few quotes from another post, but the big thing for me is that you can't find U/V & Scratch resist coated polycarbonate is small quantities (less than 4x8 sheets).Wouldn't polycarbonate or original glass be better than plain acrylic/plexiglass ?
"All major hatch, portlight and window manufacturers use Acrylic in offshore / bluewater marine products.
Acrylic is more scratch resistant than standard (9034) polycarbonate.
Acrylic is significantly more durable when exposed to Ultra Violet radiation (sunlight).
Acrylic is less expensive than Polycarbonate.
Don't misunderstand my preference for acrylic. I buy, use and sell a significant amount of both products and each has its application. In my humble opinion Acrylic is more durable, versatile and cost effective in the hands of a skilled craftsman than polycarbonate."