Some of these are sold in a White box and so-called "new" legs are sold in a Black box does anyone know what the difference is, if any, between the Two?

Do you have a link?

Hi there, could you please provide a link? We'll look into it, thanks!

Thanks for you're response.
To save you time looking at a Link I contacted an Ebay seller about this and he said "PGY are moving to White Boxes as packaging instead of Black ones, there is no new model as far as we know."
The "New" statement was from some online sites that appears to be a bit of Spruiking to attract customers to their page.
The change in box colour may have helped support this suggestion.
TY Skymax.