At least in Europe they don't. At all.
Do you mean Nordic Classicism or Funkis?
but if you compare European, African and East Asian city you can clearly see differences
Just to talk of a single country: Rome has its kind of old buildings and churches, which is different from Florence, which is different from Venice, which is different from Milan or Trieste.
Even the cobblestones are different!
and I write this as European
sure some white buildings next to sea would help me to guess I am somewhere in southern Europe maybe, but I was talking about regular buildings you see somewhere in city center from street, if you take away letters it looks pretty much same everywhere in Europe
Do some Google Maps tourism and you will see.
If you limit yourself to churches, the difference between San Paolo[0] in Rome, Milan's Duomo[1] and Venice' San Marco[2] is pretty obvious, since they come from 3 cultures which were pretty different.
Do you need a book/guide to understand why they look like that? Sure, but I bet you can tell they are different.
[0] https://en.wikipedia.org/wiki/Basilica_of_Saint_Paul_Outside...
[1] https://upload.wikimedia.org/wikipedia/commons/thumb/7/70/Mi...
[2] https://en.wikipedia.org/wiki/St_Mark%27s_Basilica#/media/Fi...
while if I would look at regular street in India with their temple, then look at temple in Thailand and then at some European church I could see the difference
nobody is saying you won't notice difference, but it's pointless because it won't help you placing you in specific country unless you have interest in old architecture styles