I have the MM-HLSC-1 and the SP-CMC-4U. I like both. I hate to get into vague descriptions which will mean something different to you, possibly, than to me but I hear the SP's as "warmer" and more forgiving. They can deal with a poor venue better. However, I have had great luck with the MM's to. But they seem a bit less "warm" to me and a bit more "analytical." These are such subjective and vague descriptions, but they seem in common use, also, so perhaps you can sort it all out. I may still have tracks I recorded simoultaneously with two MD's, side by side. If you want I will see if I can find them
Cheers