I did a side by side comparison on hardcore MP BF4 with my brother , he was using the SP2 and the only difference was the SP2 only lasted 30min to 45min more then the edge, as for daily things web surfing the edge did 5-6 hrs with brightness max and 7 hrs with brightness, and to say the edge is expensive is wrong, it's a better deal why? You buy a SP2 256 with 8 gigs of ram for $1, 299.99, you buy a razer edge pro 128 with 8 gigs of ram for
$1, 299.99, but wait here the catch, you have the option to upgrade the ram to 10gb, 16gb if you know where the last slot is, you have the option to upgrade the ssd to any size you want, and change to the best wifi card, plus you get a nvidia 640m le, plus add on like gamepad keyboard case and dock,
My point is you get to keep your edge longer, while SP2 needs tobe replaced... Surface pro 3? I know battery life is bad on both for high end games but most of us play games power plugged in, don't tell me you don't, then battery life comparing is pointless.