While I don't have the LG2 WS7, I've got the previous years version along with a GRP. 21, RB C6BBT, MR Ninja .21, and an OS V-spec.
With the exception of the OS the others are all pretty much the same. A nice smooth linear powerband, a bit softer on the bottom.
The V-Spec has tons of power everywhere. This can be good and bad. It takes a bit more throttle control on the bottom so that you aren't either spinning tires or spinning the buggy around in a circle.
IMO, the V-spec is my favorite for my driving style...