It's recently come to my attention that there are two different generations of the Moto X, thanks to TomG's suggested edit. I would assume that these devices are pretty different. Should we split them up? What should we name the tags?
We've discussed this sort of thing in the past (Should we have a nexus-7-2013 tag?) but decided not to do it.
The devices don't deviate that much. Plus, by and large, we shouldn't need device-specific tags. Most questions that use such tags are applicable to most (if not all) devices. There's more difference based on the version of the OS and/or the OEM skin (HTC Sense, Samsung Touchwiz, etc.)