both are just as waterproof, 20k. first drop has bib pants, which will probably be super helpful in deep snow, but saga has an interlocking powder skirt system that works pretty well. also, saga has 3 layer, making it more durable. i would give say that saga is more technical outerwear than FD, but they are both more than competent to do their job. so it really just comes down to which do you like more?