Before using MMo in the fuel I like to run a bottle of fuel injector cleaner followed by a Maintenance Dose of MMO. It is important to make sure the fuel system is clean.
A Maintenance Dose of MMO will do many things:
1) Lube the fuel system
2) Upper Cylinder Lubricant
3) Keep fuel injectors clean
The 2-Cycle Oil is just going to be a top end lube, it has no cleaning abilities and it will not keep the fuel system clean like MMO.
Since using MMO I have noticed a 2 m.p.g. improvement, I feel the MMO is keeping the valves sealed and clean as well as keeping the fuel injectors free of carbon.