Im still new to the hammock world and only have a season under my belt but so far I dont mind having an extra ounce or two added to my pack to have my webbing. Webbing and cinch rings are waaay more easy to adjust than whoopies. I do like my whoopies but just prefer the ease of use with the webbing. If you really want to shave a few ounces and you dont mind dealing with them in the freezing rain with numb fingers then the whoopie is for you.
Webbing is just more versatile than whoopies. Whoopies are ounce or two lighter. Both have pros and cons. Its just a preference as to which you use.