The ones at Zapp are close, but still more than Kelling. I'm surprised as I've spent ages looking for lower inductance motors, though only really Nema 23.
Either way the difference is insignificant if you're running the motor on a higher voltage with something like this:

http://www.zappautomation.co.uk/2m11...5669f8490a6970

Without that you'll never get a very high speed from that size motor, if you need it.