I mean, the framework laptop has a big marketing around something the macbook can't really do, so obviously that's the feature they are hooking you with. What's the special feature of the fedora slimbook instead? (asking, I'm not familiar with the laptop)
Betting the HDMI port is connected to the NVIDIA GPU too. That might be great for gaming, but NVIDIA drivers are still a mess on modern Linux, especially if they have to render your desktop.
https://frame.work/ca/en/products/laptop-13-gen-intel?q=proc...
It's the same price too, maybe even slightly more expensive - so I'm not sure who the market for this is. Any laptop (almost) can install Fedora.