What is the usage of 〜げ and how does it differ from 〜そう or 〜っぽい?

Question

How do these two differ, for example: 寂しそう vs 寂しげ 楽しそう vs 楽しげ 言いたそう vs 言いたげ 大人げ vs 大人っぽい（...？ Not sure if this one works.)

Answer 1

Hi! I wanna say sorry to you because no one tell you about it and I just join to this site so I didn't notice this question until now. sorry. But I think you could figure out about it already, but just in cace,

 寂しそう vs 寂しげ 楽しそう vs 楽しげ 言いたそう vs 言いたげ 大人げ vs 大人っぽい

These words are same meaning. Just different is "そう” or ”げ” right?

”そう” =We usually use, but "げ" =most use teenager or even adult who luck of knowledge. Like a slang in English. But 大人っぽい＝meaning including who wants to be like her(him). compared to them ages.

I hope to the your rescue.