Best Answer - Chosen by the Asker
I think they are almost same.
개 : change
과 : fault, bad things
천 : mend, move
선 : good
*in our dictionary, it means, 'mend one´s ways'
환 : change
골 : bone
탈 : take steal
태 : be pregnant
oh you need to know the origin of this words.
* turn over a new leaf
usually, we say '개과천선' for personality
and '환골탈태' appearance.
just 'USUALLY'
you can choose anything.
