깨나 & 꽤나
Are these both actually same but variant form of dialect?

It seems both are listed as regular entries with Daum online dictionary

Question

깨나 & 꽤나
Are these both actually same but variant form of dialect?

It seems both are listed as regular entries with Daum online dictionary

Answer

Both are different adverbs.

꽤나: quite a lot
깨나: above/beyond a certain value/standard

돈 꽤나 많은 사람: a very wealthy person
돈 깨나 있는 사람: a wealthy person (more than above average, considered rich in the neighborhood / among friends)

It's just a coincident that both are largely interchangeable while sounding similar as well.

Note that 꽤나 refers to adjectives while 깨나 to verbs.