I haven’t used mint in a while but did for a few years. The out of the box experience (at that time) was better.
Article from 2011:
Linux Mint 11 is a very respectable and speedy distribution and is comparatively very media friendly and easy to use out of the box for newcomers. These qualities likely have contributed to the operating system’s place on the Top 5 Linux Distribution list.
Take a hugely popular distro which alienates some some users with some issues or unappealing GUI choices, Mint comes along and polishes it further and you end up with a distro that is just perfect for that niche.
I think quite a few Ubuntu users migrated to KUbuntu or Mint when Canonical made Unity the default (in Ubuntu 11.04).