They both have university degrees. George W, graduated from Yale and Harvard. Charles graduated from Cambridge.
As to whether they actually learned anything,I'd say that Charles did and still does have that curiosity to learn more. He has always been willing to listen, to learn, to continue to learn.
George W. Bush pursued an MBA for practical reasons, but later in life, he has returned to his earlier study of art and has become a fine art painter.
Both men may not be academic geniuses, but they did pursue their university degrees. Charles is still eager to learn new things and George W. has become a painter.