Perhaps the most important thing about F1 2021 is that Codemasters has not messed with the actual mechanics of driving the car much, beyond tweaks necessary for the 2021-spec cars. With a good force-feedback wheel, the cars are engaging to drive, and you can feel subtleties in cars from different teams—a McLaren handles differently to an Alpine to a Red Bull to a Mercedes, as you'd hope they would. If you're a fan of the sport, you'll probably enjoy playing F1 2021.
Bowser’s Fury works just fine as an added bonus packaged with an under-appreciated platforming gem from the Wii U era. If you’ve never played 3D World before, this is a great chance to catch up on a fresh take on 3D Mario design. If you’re mainly interested in Bowser’s Fury, though, maybe wait until the strong ideas get expanded into a full, standalone game.