I’ve been considering getting a faster version of Wii sports, but I don’t know how much time each version saves over another. Would getting a faster version be worth the money?

1.2 saves more time in any category that doesn't involve baseball or boxing (except categories that end after 1 boxing match like All Sports and ASNB). 1.2 is probably the smarter version to get these days rather than 1.0, you can compete in All Sports with both 1.2 and 1.0 for sub 7, but if you're over 10 seconds behind the record, you can still improve your skill with 1.1 before needing to buy another version.

I’ll hold off on buying another version for now. Thanks for the help!