The Ooze and the Keenan are the same shape, but the difference is in how they are made. The Keenan is built like the flyboy, making it much lighter and much more lively. This also makes it have a much better feel on the water as well as makes it much more responsive.
For that price difference the only reason to get the Ooze would be if you needed to use 2 or 3 fins for some reason. Otherwise, the Keenan is a much better board.