>> The weight difference is not that large: the measured weight of the Flash is 3 pounds 6 ounces (1.53 kg) per pair, and the Elite weighs 2 pounds 6.1 ounces (1.08 kg) per pair, a difference of 1 pound (454 g). Yes, a pound (454 g) is significant if you are carrying the snowshoes, but the choice gets down to whether you need the extra traction or not. In gentle to moderate terrain, the Elite (which has aluminum alloy crampons) is adequate; but in steeper terrain and sidehills, the Lightning Flash is king.
The last statement - it's worth focusing on. This snowshoe is all about traction on steeps, sidehills, and one more scenario - in icy conditions. By nature of this snowshoe's design, it's also quite a bit more durable.
But the former statement about the weight - 1/2 pound per foot makes a difference on the pack, sure. But the difference is dramatically felt on the foot. So, if you don't need the aggressive design, the Northern Light's are a noticeably lighter shoe on the feet and utter joy to use on a winter tour.