Well if it helps, those descriptions are what I picked up from Book 4 from things characters would say like when Fleur was talking about the food at Beuxbatons in comparison to Hogwarts and the way in which her school celebrates christmas, it being much more lavish - so much so that Hogwarts seems coarse or even common to what she's used to. Or when Krum spoke about the surroundings being more cold and harsh in contrasts for example. I think JK was trying to paint the pictures of what the schools were like through such conversations but hey I could be wrong 🙂