I'm sure Apache Tika is much more capable. For example, it supports html, csv, ppt, etc instead of just html. But it also requires Java/Maven and the installation process is far from simple.

Unfluff is a small, simple .js library that can be installed and used in seconds. It doesn't have any external dependencies on data files or other language runtimes. So it just depends on which tool is right for your job. If you are writing a quick script, this might be a lot easier to use.