I will run 110 up to 14:1, but I will take camshaft design into account. 106 - 108 sep with 268+ intake duration doesn't have the dynamic compression ratio that I feel warrants C12. I have 3 customer engines in the 13.5 - 14.0 range that run every weekend on 110, they are on a 3 season freshen up cycle 2 have been freshened up once and one is on it's second freshen up cycle with the original pistons.
I moved my car to alcohol some time ago, cost per run was cut in half, makes better power, cool down time is basically nothing which takes one more thing out of equation, allowing me to prepare for the next round a little better. Makes it nice being able to basically hot lap a 7 second altered.