Don
Yep...Ogre Urethane was a very hard urethane, very much like the original Hammer urethanes...which translates to a smaller footprint and lots of length, not to mention the Ogre core only had about .03 diff.
The Crow has a much more aggressive cover, plus a high diff, more aggressive core, and the cover is nowhere near as hard. This equates to a bigger footprint and a ball that will handle some oil. I would say if you still had the Urethane Ogre, you could add the Crow and have a ball well above the Ogre Urethane.