340 vs 340.

So me and a buddy have a wager going who’s 340 is faster. Both are identical but one thing both have forged pistons 10.5 to one compression. x heads mine have ports minor cleaned. Same rpm intake 750 carb. Only difference is mines got the hemi grind cam he’s got the 508. Always liked both cams but never got to run against each other both 340 4 speeds with 391 gears. I do have a lower first gear. Both are defiant 12 second cars. I’m buying his motor too. So I think it be fun.