PatagoniaCommunity.blogspot wrote an answer about Patagonia Talus Softshell Jacket - Men's on November 23, 2010
I've owned both. I got the Guide Jacket first but soon returned it because it was too thin and breezy; cold air went right through. If you're using it for athletic endeavors, then it would be a nice, breathable choice. I needed something warmer, got the Talus and have been very happy with it. It's noticeably thicker than the Guide and the warmer interior keeps that cooler air from freezing me out. As for durability, I've had the Talus for almost a year and while I'm not rock-climbing and using it in horrible conditions, it has held up well. Of course there's a price bump with the Talus so if you don't mind that, then it may just be what you're looking for. Best wishes.