Difference in 6M and 14M Alto Sax

I have a 1956 14m Director sax which plays well. I am not a professional. I am in my late 60's and will probably never play professionally. I am not wealthy but I do have some funds available for "toys." Would there be any significant benefit to my trying to acquire a 6m "Naked Lady" sax for my own personal enjoyment of playing the instrument mostly at home? If so, why? Does the 6m have a significantly better tone, is it easier to play or is it mainly that it might be better in tune throughout it's entire range? If not, I should be content with what I have as it plays and sounds well.