What's the difference between fixing and setting spray?

Could you please clarify the distinction between fixing spray and setting spray in the context of cosmetics or hair care? As an expert in the field, I'm curious to understand how these two products differ in their function, intended use, and any specific benefits they may offer. Are they interchangeable, or do they serve distinct purposes? Additionally, are there any considerations to keep in mind when selecting between the two? Thank you for your insights.