Is a size 10 shoe wider than a 9?

Excuse me, could you please clarify something for me? I'm a bit confused about shoe sizes. Specifically, I'm wondering if a size 10 shoe is inherently wider than a size 9 shoe? Is there a standard difference in width between these two sizes, or does it vary depending on the manufacturer or style of shoe? I'm trying to get a better understanding of shoe sizing and would appreciate your insights. Thank you!