Orban is somewhat of a different story, though you might be right. I didn't really intend to include Eastern European countries though.
I remember unproven, but persistent rumours about the Kremlin may be aiding League of Polish Families (hard anti-EU right) and Samoobrona (not really left or right, more an eclectic populist movement). Both were noticeably pro-Russian.
It may sounds silly that Putin would prefer PiS, given their anti-Russian behavior, but I wouldn't be surprised if the Kremlin preferred to have a hostlie Polish government than friendly one (regimes likes to have external enemies).
You're absolutely right. The difference is that PO carries more clout in Europe (which Kremlin doesn't like), while PiS is really, really vocal (which Kremlin loves).
On the other hand some neocon publicists recently started to claim that inside PiS camp and people who are responsible for foreign affairs - especially those who work/write about "East" there is some noticeable minor (but still) shift towards so called "kresowiackie" or "neo-kresowiackie" (in contrary to the
https://en.wikipedia.org/wiki/Giedroyc_Doctrine) positions, usually in Poland until now used by not mainstream right wing parties, paleonationaldemocrats and other nationalists and mildly by some minor groups inside PSL. This approach usually has as its consequence anti-Ukrainism (?) and generally some negative feeling toward nations living in countries neighboring with Poland on the East. Needless to say that usually those who support such approach are also often pro-Russian. Everything depends on what path PiS will chose and how much more popular such approach will become.
