I had the Moto X a couple phones ago. It was nice. I thought it was a good size, and had a great feel to it.
If you're going straight from a Moto X to a Z2 you're going to have quite the adjustment. While I love how the Z2 feels, it will seem very big and cumbersome compared to the Moto X.
Signal seems the same to me with all my devices.
Software wise I prefer the Moto X.
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