Hello, I am currently interested in buying one of two different products Z380KNL and Z380KL, I would like to know specifically which are the differences between them and why KNL is more expensive, specially since I ve read that KL specs are higher other than the camera. Also since I am currently located in China i will have to buy the product here. I would like to know if there is a possibility that I can install the US based OS in it and be able to access google play, facebook and youtube when i leave this country. If anyone knows i would really apreciate the helps. Cheers.