Moto X Pure Edition vs. 2014 Moto X: Worth the upgrade?

If I didn't know any better, I'd think Motorola had developed a serious steroid problem.

You know what I'm talking about, right? The company's flagship Moto X phone has been bulking up big time from year to year -- and this summer's new Moto X Pure Edition is the beefiest version yet.

But as I learned while getting to know the device over the past several days, size isn't the only thing that sets the phone apart from its predecessor. The new Moto X features a number of significant changes -- some positive and some, well, kind of puzzling. So all combined, is it a significant enough step forward to be worth the upgrade from the 2014 model?

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