Thanks for the details comparison. Meanwhile I contacted local hp department in my country to ask if their going to bring Elite x2 and I'm waiting an answer from them. As for the resolution of the screen I thinks is just perfect and high expectations will deliver better battery life than Pro 4. (I'm not getting more than 5-5.30 hours -light to mid use- both m3 had for couple of weeks and i5 I'm having now 10 days) I thinks the very high resolution screen plus the smaller battery capacity its not helping at all. 1080p is just the write resolution for 12" device and 40mh battery capacity looks very promising. Plus replaceable battery and SSD is very attractive choice.