Present perfect tense and Perfective tense

Present perfect tense noun - A perfective tense used to express action completed in the present.

Perfective tense and present perfect tense are semantically related. In some cases you can use "Perfective tense" instead a noun phrase "Present perfect tense".

Perfective tense noun - A tense of verbs used in describing action that has been completed (sometimes regarded as perfective aspect).

Present perfect tense and perfective tense are semantically related. Sometimes you can replace phrase "Present perfect tense" with "Perfective tense", this phrases are similar.