The FN-5660-21 has a more yellow hue to it to make it look "aged". It is a perfect match against the grills in my two 1970's 412s which I assume are the originals and that is why I went with it over the others. If your goal is a vintage look go then with the 5660 but if you are replacing the tolex and trying to restore your amp to look like new then the 7005 is probably a better choice.