I asked the same question when I was looking for a new rain jacket for hunting. I went with the Kryptek because it was just about half the price of the First Lite. It is lightweight and compacts nicely. It worked well and I do not regret my choice.
I own about 5 or 6 First Lite Chama 1/4 zip shirts in various colors and camouflage. They are a great product at a decent price. I have a First Lite vest, gaiters and beanie. Both the vest and the gaiters were replaced under warranty. The customer service at First Lite is very good.
My biggest complaint with First Lite is the high price of some items. I will stick to their product on the Chama 1/4 zip shirts. I will shop around on any other items should I need them. I heard that they will only be direct marketing their gear from now on. That usually equals a giant price hike and no discounts, but time will tell.
just sayin...mh