M80 contains the "trade secret polishing oils" which can be interpreted as light concealers.
Optimum won't fill and yes, you can tune your approach and product aggressivity with the appropriate pads. From finessing pad to wool, Optimum polish works exceptionally well with every imaginable combination.
However, I'd rather recommend you the Hyper instead of the regular compound, because:
1.) You can use the normal polish with a stiff orange foam; givin it pretty good cut
2.) You can make Hyper less aggressive by mixing it with OP on the pad, so the regular compound is maybe obsolete for you
3.) Hyper is not that aggressive to be dangerous - especially with the PEX270 AE, which can finish even the more aggressive polishes to a wonderful LSP-ready level. I have this machine too and I love it!