I think there is a reasonable argument to be made that it is close to the 50/50 point. Average and usual maximum/minimum temperatures in all months are close to that, rainfall is closer to Miami for total but closer to Oklahoma City for pattern, hurricane activity is more like Miami, wind/frontal weather is more like Oklahoma City, and while the humidity is closer to Miami, the sunshine distribution being closer to Oklahoma City probably evens that out.
Let's hear your opinions!