Yes, that "let you see as many materials and maps as you like" is different. Many nodal material editors have you "inside" a particular material (and sometimes that material has to be a special Node Material). While handy, I don't find that near as useful as our approach, which is a "world view" of whatever you drop into it - multiple materials, disconnected maps, whatever you want to view - and none of it has to be a special Node Material to view it there :) Just in case that helps people re-orient how they are thinking about the Corona Node Material Editor.
TY for the feedback, all!