There must be a good reason why they prefer Ramsdale. Perhaps their goal keeping coach prefers a keeper who is competent in the 18 yard box, rather than one who is brilliant but only in his 2 yard box.
Having said that, they sold Martinez to Villa who his twice as good as both of them. So how good is their analyst?
I think Southgate likes players who are in good form (not a bad strategy), but buying clubs analyse carefully historical performance. On that basis, no one should be paying £10m + for SJ in the last year of his contract. If Ken can pull it off, it would be a major coup, but I expect circa £7m.