Confusion ! Meitetsu Panorama Car

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I am confused because there seem to be so many variations of the red Meitetsu Panorama Car. I am not exactly sure that they are all called Meitetsu. Some have real windows where others are just cut out, some have detailed lights, some have striping on the sides, some are going for a lot more than others. Might there be a list of all these explaining the differences or better yet which ones are are the most detailed or sought after.

Talking about all the ones to this...

I bet there were certain models that over the years that had many opposite features.

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Curious if this Meitetsu 7000 with the white band is rarer than say the one pictured above and how does it compare to for rarity to other like trains.

Added to which, these days you have to be sure you're not looking at an Advance version of something (unless that's what you're looking for of course!).

Sometimes I find it's not at all easy to distinguish them from the standard versions without looking for more definitive pictures with which to compare them.