Keep in mind that Prague was behind the Iron Curtain and suffered from a communist government for half a century so everything built was utilitarian. A large number of the buildings are your classic commie block and went through a renovation process trying to return the city to its past Art Nouveau look, this is why you get a bunch of adornments all over the buildings. On the other hand Helsinki and other cities are full of brutalist architecture right out of the Le Corbusier catalog which have no aesthetic value at all.

https://media.salastil.com/media/5a137a9bfc293653646ec3e1369ed5d0dac3136d2092b6fb328ece9c9dcfbe5f.png

https://media.salastil.com/media/cb5fce63d865de1c5ea53a8847bb91cd1935571094059c59c59bbe49beeeda51.png