I replaced a set of BFG AT's with BFG MT's about 18 months ago. Wanted AT's again, but none would be available for about 5+ months, so went with MT's.
WOW! The MT's are impressive, quiet, have worn really well in the almost 12K miles of use, they have been smooth, balanced and worn evenly. Off road (including sand!) they have been great, ride well, no cuts or tread damage. Now keep in mind, I have only had them in snow 2'x, but they were OK and I don't deal with those conditions very often, and when I do, I have 2 sets of chains.
For fuel mileage difference, hard to say, but seems about the same on the 60.
I found 33X10.50X15C at Tirecrawler.com for $168.00 each delivered to a tire shop here in SoCal, which mounted and balanced them for $100!