Walla Wallas are better, IMHO. But I grew up in the Walla Walla Valley, so my tastes were probably influenced a bit. Here's an article that attempts to answer

Walla Wallas are better, IMHO. But I grew up in the Walla Walla Valley, so my tastes were probably influenced a bit. Here's an article that attempts to answer your question, and goes into great detail: https://www.oregonlive.com/foodday/2012/07/which_sweet_onion_rules.html https://www.oregonlive.com/foodday/2012/07/which_sweet_onion... TLDR: Vidalia is milder. Walla Walla has a more complex flavor profile.