They are all Jay Chou’s music companies.

1. Jushi Music is Jay Chou’s personal music company, established in 2007, while Jwell Music is the music company founded by Jay Chou, established in 2017.

2. Jushi Music and Jewel Music are both Jay Chou’s music companies, but they are two independent companies, each responsible for different businesses. Jushi Music is mainly responsible for Jay Chou’s personal affairs, while Jushi Music is mainly responsible for Jay Chou’s personal affairs. Jewel Music is responsible for other artists' affairs.