I did finally get to run a 37 hp BobCat. Very short demo but I'll tell you what I thought. Shorter so of course it follows contours better, it feels very fast both in turning and top speed (feels closer to 15 mph than the 13.5 claimed), it had too much air in the tires so it rode very rough but even at the same air pressure I think the Scag would clearly ride better. The Scag feels more stable and you feel as though you are sitting lower, and of course have a lower center of gravity, so it wold seem to be better on slopes though I didn't have a slope to try it (I can tell). My friend tells me it cuts great at lower heights which I can attest to, cutting at 3" in the rain with just a little grass clippings build up on certain parts of the lawn. He says it doesn't cut as well as the Scag at higher cutting levels such as 3.5"-4" because he compared them so I'll take his word. It definitely runs faster than the Scag. For some reason the front wheels on the Bobcat spin a lot, wobble on pavement and sometimes spin after hitting a bump on a lawn. My Super Z had that problem with the standard forks on it but not with the flex forks. I can't tell much difference between the 37 Kawasaki and the 35 Briggs though I did hear the governor kick in and out of the Kawasaki while the 35 Briggs you just hear a steady boring hum that rarely changes (you never hear the governor kick in on the Briggs). I don't see anything wrong with either mower, the deck is shallower on the Bobcat but it cut well at 3". It is faster top end, and turning, but less stable feeling (you can keep a strait line easier on rough ground with the Scag). It has fast hydraulics like the Lazers. My friend likes more air in the tires than I do so I think it would ride better at a lower psi. You can buy a Bobcat much cheaper so that may be a deciding factor for many. I really don't have anything negative to say about either, not sure why the front wheels wobble on the Bobcat though. You can as previously stated by others see blade marks with a Scag in certain grasses but I haven't noticed that with the Bobcat. Am I ready to trade, NO. But I enjoyed the test drive.