Can I install takju ROM on unit with yakjuxw? I bought my Galaxy Nexus a couple of months before Jelly Bean 4.2 was announced. It got updated to 4.0.4 fine, but did not find any 4.1 update at all. So I found this question which informed me of units that had ROMs updated by Samsung instead of Google for whatever reason. And my unit is of the Samsung update legacy, yakjuxw.

Since by the time I had concrete info on this yakju, takju or whatever the 4.2 release was nearing, I decided against flashing to yakju 4.1.2, and resorted to camp Android's factory image download page. And then 4.2 OTA rolled out on the 13th. Only for the takju units that is. The download page was similarly updated. But I am running out of patience, hence the question.

tl;dr refer to the title. I would like to know if there's any issues with flashing takju or a yakju device.
The answer is yes, you can install a takju ROM on a yakjuxw device.  For that matter, you can also install a yakju ROM, or one of many other custom Galaxy Nexus ROMs (e.g. Cyanogenmod) on a device that originally had yakjuxw.

I have personally flashed both yakju and takju ROMs on my Galaxy Nexus, which originally had a yakjux (Canada) ROM.  The only possible issue is that flashing a new ROM may erase user data from the SD card (pictures, SMS messages, wifi information, etc.).  So you may want to back up your data before flashing.