I've tried all 3 models you won't go wrong with any of them for the tasks you're looking your truck to do. They're great for AT, and perform very well in wintry conditions. The Duratracs will be lighter at just 62 lbs in 315/70/17, the KO2's will be 64lbs, and the AT3W will be 73lbs. Big difference if you're looking at MPG, acceleration, braking performance etc.
I like KO2 and AT3W more in the terms of ruggedness and offroading prowess. Sidewall strength is better in this two compared to the GY's. GY's will be better in terms of weight and MPG, all 3 will drive great on wintry like roads.
They're all quiet when new, but as you start racking miles GY's will be noisier with miles, and i meant it. What i liked about the Falken before was their price. they used to be a lot cheaper than the other 2, now the difference seems to be $20 or so cheaper than the other 2 , but they're 9-13lbs heavier. That weight matters when you factor price. If you were offroading where your tires have to rub their sidewall against obstacles often i'll say get BFG or Falken. If that type of offroading is not the main concern, any of the 3 will work to your advantage when it comes to wintry traction. The Falken in 315's will last the longest as they have a deeper thread. You can expect 1/32 every 5k miles with them in that size under the RAM 1500 truck weight, same with the KO2's. They GY's go a little faster, i just don't recall the wearing down rate i had with them. I had 2 blow outs in the trail so i got rid of them a little quicker than normal lol. That's why i don't like them much when i have to rub them against rocks
Have fun.