It's my understanding that modern "imitation" vanilla is chemically identical to the natural stuff. Even so, I buy the regular...
Just remembered, it was a food lab article:
https://sweets.seriouseats.com/2013/12/taste-test-is-better-...
Food lab is my go to for food related articles interesting details behind the science and process of cooking.
https://www.amazon.com/McCormick-Natural-Vanilla-Extract-Glu...