Well, I own both. The LHT is 2 years old, the Fargo I just purchased last Sept. Basically they compliment each other, which is obvious. My LHT is a 54, with 26 in wheels. you could invest in some good mtn bike tires and it would get you thru most dirt roads and some single track. The Fargo is just the opposite, much better off road with those bike 29er (700c) wheels and fat tires. But I can put on road tires to speed it up for road touring.
I use the LHT for road touring and commuting to work. Its much quicker on the roads, but a big part of that is the big tires on the Fargo. When I'm off exploring dirt roads and some single track, the Fargo just eats that up and is very comfortable in that situation.
Brakes, well I love those disk brakes on the Fargo. The cantilevers are OK on the LHT, but I'd really like to have a LHT with disk brakes. Never had a problem with a bike with disks.
Brian