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As a Floridian and former Missourian who has been to all the states on your list, I have to go with Jacksonville and Miami as being the most different. The rest have some minor differences between the sister cities, but the difference between Miami and Jax is far more pronounced.
Jacksonville is a politically and culturally Southern city and Miami is the polar opposite.
A little nudge to the north and Jax would be in Georgia.
Nobody would notice the difference.
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