Theoretically, shorter should suit Ganna better than longer, especially considering his "track-record" (pun intended). Longer should suit Evenepoel better than shorter. But Evenepoel beat Ganna at the Euro championships as well, which was a pan-flat, very windy, short-ish (20k) parcours, rather comfortably. He beat Ganna in San Juan (16k) but that was on regular road bikes and with a short climb in it, as well. The only time Ganna beat Evenepoel was at Romandie 2019, where Evenepoel crashed in the prologue, and was in the break the entire day before the main ITT.Remco was fast in 2019 Worlds TT, dunno if Ganna was fit to start but he was there too. But maybe short distances turn tables more towards Ganna.