If you're happy with wikijs I'd advise that you probably stay on it to be honest. WikiJS is a great project. They two differ quite a bit in design and structure, if wikijs's structure works well for you already you may find yourself fighting against the BookStack structure/layout. Can always give the demo [1] a go to get an idea.
ssddanbrown|4 years ago
[1] https://demo.bookstackapp.com/