15202ST 0944 vs. 1240 differences and variations

[Dhubby]

Are the dial variations largely between Mark I vs II vs III as noted above?

Or within Mark III, there are variations in the blue too?

I'm seeing a few examples from 2015 which have the monoblock case and the Mark III dial. Curious if the blue would be different than say a later 2020/2021 model Mark III dial.

Also, for those who have handled / shopped more Jumbos -- any noticeable differences in quality / steel / etc between earlier models and later? For example, we know they changed from monoblock to tri-part. But that aside... would the 2015 bracelet feel basically same as the 2020 ones?