There is a big diff in the red and cherry and the green and yellow. No solid pigments in the green or yellow. Cure times are different. The MSM raises or lowers the cures times for attachment layers and subsequent layers by an equal amount. If u raise the MSM by .1 then u raise all the cure times by 10%.
MSM is there to adjust for individual projector output. Do the calibration print and adjust from there. You should not have to adjust anything else if the fade, balance, etc. are done. You always want the MSM to be the minimum it takes to stick to the build table and get good prints. Over exposure can cause u to loose crispness on small details and can cause prints to release from the build platform by over curing and also just waste time and lamp hrs.
Dance like nobody's watching!