We don't know that the B1 isn't compatible. All we know is that it has not been certified as being compatible -- for that matter, it may not have even been tested yet. Panasonic has tested and certified three adapters as being compatible: the WM30, WM50, and ASUS N53-A1. If you go with one of those, you know for sure it will work. If you go with something else, it may very well work -- or it may not. We don't know. But it might work.
I have tried the ASUS N53 B1 version and it does not seem to be compatible. The camera doesn't detect that a wi-fi module is installed at all. With the A1 version, however, the camera does recognize the wi-fi module and I can connect to it wi-fi access points or connect via a tablet. At least this was my experience with the DVX200. I don't actually have a UX180 to test against, but given that the supported wi-fi module list for both cameras is the same, I would expect results on the UX180 to be similar.
This experience between the two different ASUS N53 versions A1 and B1 was what led to my further investigation of the differences between the two. And the fact that the two modules use different internal chipsets has led to compatibility issues with the B1 version on Linux systems since apparently MediaTek never released an official Linux driver for the MT7662 chip used by the B1 version.
At any rate, after discovering that the two versions use different internal chips requiring different drivers, I was no longer surprised that the B1 version didn't work. Presumably, Panasonic has some kind of wi-fi module driver support built into their firmware, which is why some modules work and others don't. And it seems possible that Panasonic's own WM30 and WM50 wi-fi modules may very well be using the same Ralink chipset (or one in the same driver family) as the ASUS N53 A1 version, although that is just speculation.
It would be interesting to plug the Panasonic WM30 or WM50 into a Linux system and see what chipset they are using internally as this might suggest some other wi-fi modules to try.
