Architecture
Architecture is an obvious difference to begin with. Thailand as a Buddhist country has numerous amazing temples or wats. Thai temples are usually beautifully decorated from outside and inside is not as delicate and neat as the outside. While in Prague, we visited few churches and we were amazed by the stunning and extravagant interior of each place, and very high-ceiling halls.
I live in the city center of Bangkok so I am familiar with seeing a lot of new modern buildings, hotels, houses and condominiums coming up all the time, which is also the same as other developing parts of Thailand. I was impressed to see that in the residential area of Prague city center there are still many beautiful old buildings in different colors and people still live there. It was charming.