Default Which version to get? Verizon/T-Mobile

Hello I am considering purchasing a Moto X from the Motomaker, but I am unsure of which version to get. I am currently grandfathered into unlimited data, but I have a feeling once the rest of my family plan upgrades to smart phones I will be bumped off the unlimited data. I have been trying out T-Mobile for the past month and find the coverage to be almost as good as Verizon. From my understanding and reading the Verizon version of the Moto X has all of the bands for T-Mobile except for the LTE band. Can I just throw a T-Mobile sim card into the Verizon Moto X and it will work?

Thank you for your help.