Thanks GGG, that is great info!
Interesting observation:
LionChief Plus started me with command control (I love my LC+ locos).
Lack of good modern LC+ locos drew my to try MTH with the Remote Commander.
Now the Remote Commander will run more new PS3 locos - more choices for me.
More MTH purchases ahead,
Which makes me think I will look forward to purchasing the full DCS system rather than Legacy.
Not exactly what Lionel intended. I don't mean anything negative toward either manufacture, I just found this to be an interesting outcome, and unintended chain of decision. The Remote Commander with newer PS3 flexibilty looks to be like a competitive advantage.