Slide wall construction and damage question

I still have not been able to get my trailer up to the dealer for them to physically look at it but I have spoken to Dutchman who told me the slide walls are a "fiberglass composite". I did notice something odd. The outer surfaces of my bedroom slide, the one with the bulge looks totally different from my other 2 slides. My bedroom slide outer surface is mirror smooth and shines where as the the other 2 slides have a textured finish and looks like a normal fiberglass surface. Any ideas why my slides may be made of different materials or am just seeing things? First picture is bedroom slide outerwall and the second picture is of my living room slide.