INTP Einstein (5w4) seems very fond of deeply abstract metaphysical constructs that appeal to him aesthetically. The theory of relativity is a prime example. He was very imaginative and aware of his internal states. Einstein also went with feelings and trusted what sprang from his heart.
INTP Darwin (5w6) liked gathering endless amounts of information and synthesizing it together into a whole. This was done in developing his theory of evolution. Reason and rationality led him in forging his designs. Darwin was much more intellectual and had an unbreakable heart of stone.
So folks, what do you think? Feel free to offer your opinions and information comparing the 2 individuals to see how 5w4 and 5w6 INTPs differ! Any information on their respective theories of relativity and evolution would also be nice. I know in their interrelationships that time is a critical factor for both models in the dynamics of change, cause and effect transformations.