Powder is what my guys like. In 1 lake here in WV theres like 200 pontoons at a marina. And a few docks. They have bought both from me, but perfer powder paint cured...This is just what they perfer here.
Vinyl is tough but powder cured properly is hard as concrete . Vinyl is easier to spray patterns with but it is toxic as heck . I've read the msds on it . If you get a head full of the fumes I promise you will feel like you are drunk . Extreme ventilation is best to have when using it.