different

present perfect often shows that sth is finished. it focuses on the result of the actio-n

present perfect continuous often shows that an activity is unfinished. it focuses on the continuation of an action.

Present perfect to talk about -how much someone has done.
-how many times someone has done sth.
-how many things someone has done.

we often use the present perfect continuous to talk about how long sth has been ha-ppening

Putonghua's Use 23 Perfect Tense
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Zi You Xuan Wen Ti Suo Ren Qu Pian Ou Na Mei Li Ke Ju He Gui Fan Er Ding Chu Ben An 23

Show by using one verb "do" as an example:

Present Perfect:
I have done it. - 我己經做(到)了/完成了。= I have completed something and the case is closed.

Perfect Prefect Consinuous:
I have been doing it. - 我已經一直在做(這事)...仍繼續工作中。= I have started to do (it)this from some time ago and still working on/doing it now as I speak and will continue doing until...(don't know when it will be finished).