What is the difference between the Mach series accelerator and normal Torco accelerator?

Normal stuff
Torco Accelerator

Mach series Accelerator
Torco Accelerator, Unleaded Race Fuel Concentrate, Case of 6 -

Also what is the cheapest place you have found to buy the unleaded accelerator online?

And do you think the MMT buildup could be taken care of with a yearly seafoam treatment?