Read PC Mag's review of the Moto X published shortly ahead of the Maxx.
Compare what they said about the Moto X voice quality vs. their Maxx experience.
Read what they say about AT&T bloat vs.Verizon, but see in the Maxx review how this is spun into a Maxx vs. Moto comparison (it's not -- Moto X on Verizon has the same easily disableable apps pre-installed).
Also note how Moto X is "best ever" ostensibly because of Moto Maker -- that's the only (current) difference in Moto X variants. Oh, and 32 GB availability, but I don't believe they touched on that?