72 Y9 Tawney Gold versus 73 Y9 Tahitian Gold

I am in the process of pulling the front valence off my 72 and going to paint it with touch up paint and clear coat from automotivetouchup.com. I am having a tough job finding the 72 Tawney Gold Metallic Code Y9. However they have listed a Tahitian Gold Metallic Code Y9 for 73 model year. I am wondering how close these two are, or should I really push them to make a 72 Y9? They are checking to see if they can mix that paint color.

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Author: Moseman