Peeping around another forum I ran across this discussion regarding switching your sim card from one device to another (both must be on the same carrier)
The poster said,
" I have the Galaxy S4 now and like it, but I've wanted to try the 928 as well...this way, I can swap my sim back and forth and try both back to back."
Can you do that? Can you just remove your sim card out of your current VZW phone, pop it in your new Verizon Moto-x phone and start enjoying your new device. Then if you don't like something about it, remove the sim card out of the Moto, pop it back into your old VZW phone and get back to square one?