It's true that Linux may be a bit better in some cases, if you have a system that has good Linux support, but I think in most cases it should never make a very substantial difference. On some of the newer Intel laptops, there are still missing power management features anyways, so it's hard to compare.
That said, Intel still has yet to catch up to AMD on efficiency unfortunately, they've improved generationally but if you look at power efficiency benchmarks of Intel CPUs vs AMD you can see AMD comfortably owns the entire top of the chart. Also, as a many-time Microsoft Surface owner, I can also confirm that these devices are rarely good showcases for the chipsets inside of them: they tend to be constrained by both power and thermal limits. There are a lot of good laptops on the market, I wouldn't compare a MacBook, even a MacBook Air, a laptop, with a Surface Pro, a 2-in-1 device. Heck, even my Intel Surface Laptop 4, a device I kinda like, isn't the ideal showcase for its already mediocre 11th gen Intel processor...
The Mac laptop market is pretty easy: you buy the laptops they make, and you get what you get. On one hand, that means no need to worry about looking at reviews or comparisons, except to pick a model. They all perform reasonably well, the touchpad will always be good, the keyboard is alright. On the other hand, you really do get what you get: no touchscreens, no repairability, no booting directly into Windows, etc.