A cursory glance at the timeline brings some doubt as to whether this particular album would be Capton's primary influence anyway. If the album in question was released in 1961, wouldn't ole Slowhand have already been playing with the Yarbirds.
This is a bit before my time, but isn't it a safe assumption if EC was indeed influenced by RJ that it was an earlier album. Isn't there an element of trans-atlantic trade after WW2 at play here?