Thanks! Very useful information. I will never play for Bowser again.
Once at a Mario Kart 8 tournament I was helping run there was a kid who had picked Bowser and max speed and he was struggling to make every turn. I switched him to the meta build and suddenly boom, he went from like 10th to 2nd against the AIs. It's kinda weird that you can shoot yourself in the foot so much when picking your kart in this game.
That's why certain tracks were played with the Torpedo/Spear in that game. It's very fast, but has the turning radius of a bus on ice. Great on something like Mario Circuit, probably a complete catastrophe on something like Bowser's Castle or Rainbow Road.
There's also battle mode, but I have no idea which karts are preferred there.