I came from an S3. I thought its camera was better than the Moto. Closer focus distance for macro shots. Much quicker. More accurate focus. However, I enjoy the quick twist access on the X and I've found the still pictures to be good enough. Just doesn't work for fast objects. Video is fine.
That being said, the other features on this phone for me for outweigh the camera weakness. I'm a fairly big camera/photography enthusiast too so it really is a decision on what's important in a phone.
There's an entire thread on here with examples and several others which talk about the topic.
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