Fiebing Saddle Soap Yellow Tin

What is the difference between the Yellow and White Saddle Soap?

Traditionally the yellow paste was for use on saddles and tack, the white paste for use on shoes and boots.  That said, it was more for the consumer peace of mind as no color is imparted on the leather from the yellow paste.  Think of bar soap you use on your hands, sometimes it is white, other times yellow. Neither will transfer color and both will clean and condition just the same.