There is one huge difference between these two phones aside from the screen size and internal specs, and that is the price. The Moto X is a great phone, but they cut back in a few areas in order to hit that all-important $399 price point. The 16GB model is only $399, completely customizable, and you can add a micro-SD card. Get one today from Motorola.com.
The DROID Turbo 2 however, is $629. That's $229 more for a similar phone with a smaller screen. But one with a huge battery, wireless charging, a better camera with a more powerful 8-core processor, and a few other things. That said, Verizon is offering it for $26 per month for the 32GB model, or $30 a month for the 64GB version, which is the only model that offers the design refresh we mentioned earlier. We'd recommend the 64GB model.
However, if you add leather, engravings, or the nylon back the DROID Turbo 2 starts to cost even more, and here we've made one that is nearly $750 because we added 64GB of storage and a few other things. Meaning that the Moto X is nearly 40% cheaper, for almost the same experience.
Don't get us wrong, the DROID Turbo 2 is a better phone, but is a little more power and more battery life worth almost double the cost? That's up to you to decide.