Cities with the looks and vibes of Bratislava?

I wonder what are some cities that have the same vibe as Bratislava? A city with a compact old town, residential neighborhoods with commie/Modernist architecture with lots of playgrounds and wide green spaces between the flats, on a large river or water body. Rougher around the edges than Prague or Maribor (other cities in the region I've been to) but relatively clean and safe.

I was thinking maybe Zagreb and Vilnius. Maybe Riga, Klaipeda and Tallinn as the coastal versions. Budapest would be culturally similar and is on the Danube but is quite larger.