The Nostalgic Horses – Solution

When you look at the second photo where the rings are located at the bottom, you’ll spot an extra ring missing from the first photo. The photo on the top has a brown colored patch on the saddle, while the lower photo has a green colored patch on the saddle.

The third one might be the hardest one yet to spot, but the ribbon decorations positioned on the right-hand side of both photos are different. In the first photo, the ribbon decoration appears longer, while it seems shorter in length in the second photo.