Just to add, i went from JB4 G5 ISO with BMS flash to Cobb S2+FMIC aggressive LT, its basically 1 cup of coffee vs 3 cups of tea comparison, respectively, you get the same effect in the end but different delivery.
coffee: even the iso + bms flash was jumpy, rush of power - perfect for the 1/4 mile, and thats where it shines. feels fast.
tea: the cobb is a slow-smooth power, allowing to gradually dial it in with the right foot. perfect for daily driving and HPDE. i am new to cobb, so using OTS, but i am sure with the protune will be even better.
to each his own.