The software is mostly similar. The Droid Turbo has more bloatware mostly due to the inclusion of a bunch of Amazon apps that cannot be removed, just disabled. Some of the settings menus have a slightly different look on the Turbo (barely noticeable but it is different) compared to the Moto X which is pretty much the stock settings screen. The command widget is only on the Droid Turbo as well.
The bigger question will be how close the software is after Android 5.0 rolls out. Last year when 4.4 rolled out the Moto X picked up the new dialer and UI styles while the Droid Maxx, Ultra and Mini kept the Jellybean dialer and blue UI accents. 4.4.4 added the white UI elements to the Droid's but it never got the KitKat dialer. Hopefully this time around they will do a better job at keeping them in line.