As adverbs the difference between optionally and selectively
is that optionally is in an optional manner. Not mandatorily while selectively is in a selective manner, only affecting or applying to some selected cases.
optionally
English
Adverb
(
en adverb)
In an optional manner. Not mandatorily.
Synonyms
* facultatively
Antonyms
* mandatorily
selectively
English
Adverb
(
en adverb)
In a selective manner, only affecting or applying to some selected cases.