Concern over two widely different views of Europe

HOW can two Bank of England governors have such widely differing thinking about Britain’s relationship with the EU?

Ex- governor Mervyn King states in his book that based on his period in charge he thinks we’d be better off outside the EU.

Whereas Mark Carney, who has only been in the role for the last few years, apparently believes we would be better off staying in.

Armed with the same data, how can there be such a difference? I know who I believe.