Apple iPhone 12 Pro/Max vs iPhone 11 Pro/Max

Apple’s  brought a puzzle for each iPhone 11 model owner, should I upgrade to one of the ? The task is further confused by the fact that both on the low iPhone 12, and on the high end, we will have models with different display sizes than their predecessors.
Actually, only the carries over the screen diagonal of the (but swaps LCD for OLED display tech), everything else is smaller or larger than what Apple has done so far.
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