Here's some more example sentences. 1) What's the difference between (noun) and (noun)? - 개울과 강의 차이가 뭐야? What is the difference between a creek and a river? - 휴가와 여가의 차이점이 뭐야? .. "different points / details" between vacation and leisure? - 휴가와 여가 사이의 차이점이 뭐야? (emphasized "between": 사이) 2) What's the difference between that one and this one? - 저것과 이것의 [차이/차이점/다른 점]이 무엇입니까? - 저것과 이것은 어떻게 다릅니까? How is that one different from this one.

1) What's the difference between (noun) and (noun)? Noun이랑/랑/하고 Noun 차이가/다른점이 뭐야? / means or i think there are a lot of forms about this. it is just one of them and it's not polite expression. please use it between friends. and 랑/이랑, it's up to the noun. 사과, 바지, 의자 + 랑 가방, 신발, 식탁 + 이랑 i hope you can find the difference between these thing's last letter. i dont know how to explain it in english. under letter(?) and i think you can use 하고 with any noun. 2) What's the difference between that one and this one? 이거(this one)랑/하고 저거(that one) 차이가/다른점이 뭐야? also not polite expression.