Don't know if it'll help but there are several saws out there that work, one I've demo'd and its the cats a**, made in missouri, the blade rotates so you can cut horizontally as well, cuts at or below ground level and made by Harleman Mfg.417-876-3011. Another was in the farm show magazine a while back, made out west, can't remember the name or find the article but looked like an improved model over harleman's [more user friendly and durable tooth design] with what looked like dura disk stump grinder teeth which would be better than harleman's tooth design but it also swiveled and you could cut horizontally. If you can't find the article maybe I could find something if I dug long enough but it was this year sometime I saw it while thumbing through the magazine.
From what I saw of bobcats last design it was more of a cheaper knockoff and not really durable or something I'd buy but that was a couple of years ago when I was researching them for myself. I ran harlemans saw and it was tough and would take down and cut up some larger trees but I was leary of the tooth design, it looked like a lot of maintance to me but you could shove and pick stuff up and manhandle brush and trees with it nicely. I never bought one because believe it or not I wanted one that would cut larger diameter stuff than what was on the market to help eliminate all the chainsaw work we do but I'm leaning towards something on an excavator like a grapple saw but still haven't found quite what I want yet.
The turbo saw if I recall was a higher speed blade and wasn't very durable and had a poor tooth design............anyhow there are a lot better designs out there if you look, memory isn't working quite like it should this morning but bobcat and turbo saw were eliminated right off the bat when I was doing research, I'd talked to enough unsatisified customers that I hunted elsewhere, sorry to not be any more help than that, I'll try to find the article again on the unit made out west and post the name and number of the manufacturer.