The Championship is ranked as a higher league than the Russian league, isn’t it? A quick Google tells me the Championship is ranked Europe’s 6th strongest league.
So that would put Bundesliga, PL, Serie A, Ligue 1 and La Liga ahead?
Im sure the Eredivisie or Liga Portugal would argue with that. Can’t see too many players from the better sides in those leagues be gagging to join a Champ side. Krasnodar are the current champs in Russian so they would surely consider it a drop down. Anyway they are saying about selling to a top league as their preference, rather than the Russian league being better