What are the differences between Michelin's summer and winter tires?

As a long-time fan of Michelin tires, I've been trying to understand the nuances behind their summer and winter offerings. While I'm familiar with the general benefits of each type (e.g., summer for dry conditions, winter for snow/ice), I'd love to dive deeper into the specifics. What are the key differences in tread compound, tire design, or other features that set Michelin's summer tires (like Pilot Sport) apart from their winter counterparts (like X-Ice)? Are there certain models or sizes where this difference is more pronounced? I'm hoping for some insight from fellow Michelin enthusiasts to help me make an informed decision.