Depends on who wrote them and how much fuel they're throwing. It seems they all appeal to people with a silly name followed by a +number in parenthesis relating to horsepower gain. Like "Wild Tune (+165hp)" or "Tow Tune (+45)" and you'd think the wild tune would smoke more just because but that ain't always the case. On my Livewire I have a River City tow tune that claims under 75 horse... It smokes like crazy. The +135 performance tune from Truckworx only smokes when I really put the hammer down. And the smoker tune is way milder than the performance tune, so there's no rhyme or reason to it.