Interesting to see Kirk has just signed with Berlin in the DEL. Not sure if it's a step up or down from the Czech league, but a great place to live and work for him.
League is probably not a step up but he is moving from one of the poorest teams in the country to one of the richest teams in the richer country. He moved from the club with 2,5k average attendance, to 4,5k average attendance, to 12k average attendance. In hockey, moving up or down is reflected in dollars and cents at the end of the day.
Jukurit a little better though, and Liiga is a better League than the two others.
At this point, it's extremely debatable. Half of the Finnish league is basically development teams, at this point. And Jukurit is a great example, once again, one of the poorer Czech league teams managed to lure Kirk away. Liiga has 5/15 teams with average attendance above 3k, it's a miracle they managed to hang in there with the big leagues as is. DEL, by comparison, has no teams with average attendance lower than 3k and league-wide average attendance of 7k.
If you look at the scoring rates of players who have played in DEL and Liiga recently, they too are practically identical and that is only thanks to strong young local Finnish talent playing at relatively discount prices.
Edit: Further evidence provided moments ago by Oskars Batna moving to Hradec Kralove after his breakout season in Jukurit.