Absolutely nothing. The MP-1's, according to you guys, seem to be the dogs........, but when I tried to order 2 packs at $13 dollars a pack, the postage was almost the same price. I want some of the MP-1's but that works out as £13 notes each. BUT I noticed some MT-1's in local decathalon at £10 a pack and what I want to know is Do the MT-1's perform as well as the MP-1's. If they do, then they will do for my BOB but if they ain't as good then I will have to trawl the net til I find someone that delivers cheaper. If you, or any one else, knows someone that does, would you drop me a line...PLEASE