I cannot comment on the two outfits you mentioned as I do not shop at Gander Mountain. I will suggest though that you determine how the waterproofness of each garment is being obtained. Some actually have a waterproof layer while others rely on a urethane style coating to repel water. Both work but I have found the urethane coating requires reapplication over time.

If you happen by a Cabelas or their website then I would highly recommend any of their Dry Plus garments or Mad Dog Gear's waterproof suits. I own both and have found both to be very good for early season bowhunting.