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Physical version of Mario Kart World will cost €90
(hexbear.net)
And on the American website, the MSRP is $80, with no distinction made between digital and physical yet.
Interesting, as according to IGN the Switch 2 bundled with Mario Kart is $499, only $50 more than the Switch 2 without the bundle. They must be really pushing people to get the bundle version.
Probably, the DK game is also cheaper than MK