PCMEM,
It was indeed a white filter and I returned it on Saturday at 8:00am when they opened. I talked to the parts lady and she first informed me that it was normal for Kubota to have a couple different filters that fit and she turned over the unit and showed me the oring being set in rather than on the very outside of the filter. She said probably that was the case with this one, but would double check (especially because that is when I pulled out my part number). While looking it up and printing off the recommended reference sheets, she looked at her cheat sheet in the back. She indicated that she did show both numbers there, so went in the back and found the correct number I was looking for. Pulled it out and said I guess your right about the size difference. Anyhow, she went over to the print out, and it only called out the number I had given her. She gave me the new filter and apologized for the mix up. It was actually $1 more, but she didn't charge me for it. I appreciated that, since I had lost the time the night before.
So, to make a long story short, I don't know if the other would work, but the original was kinda tight to get out and get a wrench on, so I think I will just stay with it as long as possible.