Same content and the same facts in all four, four different visual arguments. The previews below are the live pages, scaled down. Open one full size, then say which to keep.
Still open in all three: the bios for Prof. Marešová and Prof. Kuča were written from their roles and need their own words, and hello@vesperdynamics.org does not exist yet. All three pages carry noindex, so nothing here reaches a search engine.