Roger, We have a 1 year old embossed leather ottoman with a large beverage stain. We tried to clean it and the stain remains but looks like there is less color everywhere else. I think the embossing has diminished.
We used Leather Cleaner, Rinse, Hydrator, and Fatliquore. Not sure if it will show up much in the pictures. I'm not too worried about the loss color yet, if we can either remove the darker stain areas or darken the rest of the leather to match.
Original before touching it.




After we cleaned it







We never cleaned the sides- and there is a difference in color but not as pronounced as the other pictures. These were taken in 2 different environments, the ottoman is in our shop now.