Whichever material is more UV resistant would be my recommendation.
Woven Acrylic is often referred to as "Sunbrella" which is a trade name for a company's offering.
Woven Acrylic is more UV resistant but Vinyl is more "Bird Poop" resistant
Woven Acrylic is becoming more the favorite among boaters. More flexible, doesn't crack as easy.
For RV use, vinyl can become rather stiff and brittle when the weather gets real colt, often cracking.
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