They comparison exists because the majority of buyers will probably have an Intel-based Macbook Pro. From a marketing perspective, it is more useful to focus on

They comparison exists because the majority of buyers will probably have an Intel-based Macbook Pro. From a marketing perspective, it is more useful to focus on how much faster it is than that product than it would be to focus on how much faster it is than some-very-specific Windows laptop, or an M1 Pro.