I've recently launched an idea at https://polytype.dev — a sort of Rosetta Stone for #typesetting engines.

The goal is to build up a sample gallery that showcases both differences and similarities between the input and output of #SILE, #TeXLaTeX, #Typst, #speedata, #weasyprint, #pagedjs, #groff, #satysfi, #patoline, and potentially others.

The source code is at https://github.com/alerque/polytype and contributions are very welcome! The UI in particular could use the touch of a front-end developer!