Never played Crash kart racing, so i cant say either way, but I will say this:
Its good that Mario Kart dosent have monopoly.Even if Nintendo always strives for quality, a little competition is always good to keep everyone on their toes.
My (locked) thread about how difficulty should be a decision for the developers, not the gamers.
https://gamrconnect.vgchartz.com/thread.php?id=241866&page=1