I don't own it, but I would consider it a downgrade from the One. The screen isn't as good, the processor isn't as powerful, the design/build materials leave a lot to be desired, and the camera is GARBAGE. But that's just my opinion.
This is an absolute garbage post. Commenting like this on something you don't even own? Really? What made you feel qualified to even open your mouth?
OP, I've had the One and I have the S4 and Moto X now. I wouldn't trade the X for any other Android phone I've used, and I've had a lot of them.
Yes, the camera isn't as good as the S4, but there aren't many that are. That being said, it's miles better than the One's over hyped Ultrapixel crap camera. Can you get good shots out of the One? Sure. But head to head, I'd take the Moto X camera every time over the One.
And don't get me wrong, I loved everything else about the One. But in the end, the camera killed it for me.
As far as comparing screens, in real world use, you can't tell a difference. If you go looking at them, side by side, you might be able to see a bit of a difference, but it's negligible.
Obviously the One wins on the speakers, but the X's speaker is plenty loud enough and has better sound than my S4.
The Moto X is the only phone I can say you can't truly appreciate until you actually use it. It's amazing how just using it can convince you of how good it is. It's better optimized than any Android phone I've ever used, and that's saying something.