The key chain on the left is Tiffany & Co. and the one on the right is Marc by Marc Jacobs. Thanks to the reader who sent this in; the similarity between the two designs is uncanny, to say the least! The most obvious difference is the medium--Tiffany's is made with sterling silver, while Marc's is silver-plated brass. The Tiffany piece looks polished and sleek, while Marc's has a faux-antique charm. Another big difference is the price tag: Tiffany's cost $140; Marc's cost $8. We think both key chains are cute, but we'll stick to the ones we already carry.