Scans_Daily

Part of it is that the Big Hero 6 weren't a well known Marvel property, very few people have read the mini where Fred was introduced. And another part is that the Disney adaptation pretty much completely divorced themselves from their Marvel roots (with the sole exception of the Stan Lee cameo)

Furthermore the original characters were created with some racist connotations (Wasabi-no-Ginger was a character's name and he was a sushi chef and he had very little character beyond that)

The movie wasn't about a Japanese superhero team, they were all in the US which explains the diversity of the characters (Wasabi was now African American, Honey was Hispanic, Gogo was Korean, and Fred may have been Jewish like his vice actor)

Even though they set the movie in America, they still tryied to respect the Japanese roots of the series by creating San Fransokyo and fusing a lot of Japanese iconography and culture into every facet of the movie.

And at the end of the day the main protagonist Hiro and his brother were still of Japanese descent, and their relationship was at the core of the movie.

Meanwhile Doctor Strange was about this obnoxious white man using his wealth and influence to find out about a secret enclave of mystics in Himalayas where the most senior sorcerer and the most powerful among them was now a white woman and most of the Asian characters were background characters who didn't even have names let alone any real importance to the plot. (Wong had a name but I would really hesitate to say he had any importance to the plot)

So for me it was a difference in execution. One film felt like it was respecting Japanese culture and people, the other film just used Nepal as a backdrop because they liked the aesthetic