Nick O, I'd go with the Aqualon just for the type of fabrics each are. Sunbrella is a woven acrylic that will over time lose its waterproofness, where Aqualon is a poly vinyl coated that will not lose it. Ventilation is required with the Aqualon but overall I recommend it over sunbrella. Both carry same limited warranties. More questions call me 573-346-7155 at LOTO area around Camdenton, Mo.