[Pie4Weebl]

Well they are really two different approaches entirly, and its not really a case of one of the other. For instance anytime you are using moving lights*, pars*, elipsodals* or anything of the sort you are pretty limited to cmy subtractive mixing. The only time as of right now where you might use RGB is for cyc lights, or with strip lights, but then color mixing is difficult since transparancy's are off with gels along with it being hard to get a true R, G or B.*

*This all gets thrown out the window when LED's getting improved output.