Droid Life is reporting that the Motorola XOOM Wi-Fi will soon receive its Jelly Bean update, and will arrive as Android 4.1.1 Build JRO03H. This build is slightly newer than what is on the Nexus 7.
The Nexus 7 has been updated to build JRO03D, but this new build is slighter newer, but what is included shouldn't be much different to the Nexus 7's updated JB.
But, the XOOM receiving Jelly Bean would make it the first 10-inch tablet to receive the OS, meaning we get to see what the "full tablet experience" of Jelly Bean will feel like compared to the Nexus 7's 7-inch screen size. The update has been delayed for the XOOM Wi-Fi, and should hopefully be out any day now.