I just got back from the Stafford Odeon.
Objectively speaking, I would say that Sonic is still the better film out of Sonic and Mario, but subjectively I enjoyed Mario far more. Mario is closer to its games with the nostalgic 8-bit sounds and the level designs for us middle-aged gamers. A lot of the soundtrack is instantly recognisable, with some nice/unusual arrangements for good measure. Donkey Kong was a nice addition and Peach was awesome with the blue power-up dress. Without spoiling it too much, Mario Kart played a big part as well as in the actual racing, the cars/bikes and the track designs.
Another good point from me is that there was no agenda or politics in Mario, on par with some of the other commens in this thread. If Mario was Disney, then it would be on par with Ralph Breaks the Internet. This was from 2018, a time just before Disney went to the dogs with putting politics into their films. Disney needs to get their head out of the sand, and I say that as a big Disney fan myself.
I'm giving Mario a solid 9 out of 10.