[userbinator]

I also wonder how brotli/lzma would compare here.

Far better, just like anything else based on arithmetic coding. The main distinction here is that the output can still be decompressed with a standard Inflate implementation.

[atiedebee]

Except that brotli uses Huffman coding. It's main claim to fame is using higher order statistics to select a Huffman table and its built-in dictionary.

This class of compression programs sees larger differences due to the way the data is modelled instead of the specific entropy coder used.