The Old Man Mountain Cold Spring
Load Capacity: 50 lbs.
Weight: 610 g
The Freeload Sport Rack
Capacity: 25 kg (55 lbs.)
Weight: 810 g (with med. length struts)
Both racks have the same weight capacity and the price is relatively close. Both are available at through local bike shops or through QBP, but the Freeload is manufactured in New Zealand and the OMM Cold Spring is made in the good ole' US of A. Ideally I would prefer to buy American, but if I can get one rack that fits several bikes including the Pugs then it's a no-brainer. However, I'm waiting to hear from Freeload if their rack is indeed compatible for use with fatbikes. They have a photo of a Pugsley fitted with a rack, but I'm unsure if it is a prototype or is already on the market.
The one concern I had about the Freeload is durability, but from what I've read and seen there doesn't appear to be any problems with this particular rack and its design. I also think it gives me a good deal more flexibility.