www.oneill.com/mens-wake-gear-pfds.php Vapor has a zipper in the back that goes up 1/3 of the way up from the bottom.
Gooru has no zippers and is a pullover. Also it is a reverable. It also looks like it has a little more padding.
Had the Vapor, but never really used it. My brother in law loved it and claimed that as his vest of choice.
Hope this helped.