How to tell Screens & LCD Assemblies apart?

I always label each screen when it arrives. Another tech gave me a bunch of unlabeled & unused screen & LCD Assemblies because he no longer has time to do the repairs. They are in plastic and I cannot manage to differentiate between them. I am trying to decide if I should just toss them or how I can confidently tell which screen & LCD assembly is which. I know they are all iPhone 6 assemblies. They were ordered from Amazon, so the only packaging is the plastic, and there are no labels to say which is which.

I know from the assemblies (and repairs I have done) some phones have a sideways screw near the camera assembly, some phones have two parallel in line ribbons, some have one ribbon going left to right and one (smaller one) going up and down, some have 3 ribbons, and one assembly (with camera and home button) has 4 ribbons. Some phones seem to have the home button ribbon built into the LCD and some seem to keep it attached to the back plate. These are the obvious differences I can see.

What specific physical differences are there between the screen assemblies (without home buttons, back plates, and the camera ribbon assemblies) are there between the iPhone 6, 6S, 6S +, and 6+?

OK, so looking at 5 of them all of which are the same size and I believe are therefore Plus displays.

First, the known Display - in the box is a 6S Plus display (Still in the box and purchased for a replacement tomorrow).

I therefore believe this is a 6S Plus Display as well (Note that the cable configuration is similar and it does NOT have the sideways screw).

This would make these three displays 6 Plus Displays, Note that they do have the sideways screw and similar cable configurations).