Confused between OnePlus X and Lenovo Vibe X3

I need to make a selection between OnePlus X and Lenovo Vibe X3.

I am inclined towards OnePlus X because of its success brand and OS. However inclined towards Lenovo X3 because of competitively better specs.

3rd Option could be Asus Zenfone 2 ZE551ML

Compare and suggest guys.

Lenovo Vibe X3 vs. OnePlus X vs. Asus Zenfone 2 ZE551ML - GSMArena.com