Yessir, I saw your comment. I'm going to respond here and delete it there so I can be a bit more informative to a different audience.
Like Furu said, the Ground Shark is cheaper at around $11.5k usually vs upper twenties give or take $5k roughly. Operating costs depends on the environment they operate in, and as Furu said, a direct comparison isn't really applicable. The Ground Shark was and is an easy and affordable way for me to offer "industrial mowing/mulching" which was a market I very much wanted to want.
With the way and directions my two companies are growing, industrial mowing/mulching doesn't really interest me as much. I still have made money with the mower ($175/hr with the SVL90-2), but having an $80k fast depreciating investment that requires my time (I don't have an employee to run it) and only grosses $175/hr doesn't really make sense with the higher operating costs. I'm not complaining about any of it, as I've said, it just doesn't fit the current direction my companies are headed. That mower will have done well over $20k in work for a radio company alone to buy air time next year for advertising.