Who’d win?
Doing what?
Inferno, of course. Psychotic delusional pyromaniac giant robotic ants beat mear humans any day of the week. 
The barbecue always wins of course - if it’s pre-heated.
Blowtorch is armed with a flamethrower. Barbecue is a firefighter. They’d just keep cancelling each other out all day, until one runs out of fuel or the other runs out of fire-retardant foam spray!
Well, the Barbecue is alredy cooked (otherwise it’s just be a dead pig), so I see no contest here.
Yo Joe.
Both are wearing fireproof suits.
Blowtorch has a flamethrower.
Barbecue has an axe.
Bye-bye Blowtorch.
Dangit, and here I was thinking that this would involve liquid oxygen.