The Keecat with an OS 91fx is slower then the Bobcat running a 46ax. With the right prop it's close, but still a tad slower. Wrong prop and it is quite a bit slower. I've got a 55ax in my Bobcat and it's faster then either. I've flown the Keecat and while it is slower it is a nice flying plane. The retractable gear works and aside from some linkage issues appears to be pretty resilient. Watch the wing mounting bolts on the Keecat if you plan on leaving it assembled. The one at our field has had the bolts come loose after relatively short time.