"Pete C." fired this volley in news:4f41835d$0$21187
:

I have no problem running EMC2 for a retrofit,
it didn't exist when I did my CNC shoot-out between EMC and MACH2, if it
had I may have gone with EMC2.

You need to review your research. From all I can tell, Mach2 is a
proprietary version of EMC, and appeared well after EMC first came out.

Lloyd