Tech Question: M11X Bottom Access Panel and LCD Assy Differences R1 vs. R2 vs. R3

As title^, are they just different colours and P/N or do they have different fitments and all?
In other words if I had M11X R1, would R2 or R3 bottom access panel work for me just fine?
Same goes if I am trying to get panel for m11x R2 will R1 bottom access panel work?

Also, how about LCD assy differences between all 3 models, are they completely interchangeable or not? I mean where it comes full LCD/LID/HINGES/PLEXI GLASS/WEBCAM - Full complete assy.


Thanks