petabyte vs PiB

petabyte and PiB both are nouns.

Word	Noun	Adjective	Verb	Adverb
petabyte	Yes	No	No	No
PiB	Yes	No	No	No

As nouns, petabyte and PiB are synonyms defined as:

petabyte and PiB: a unit of information equal to 1024 tebibytes or 2^50 bytes

Other synonyms of petabyte include PB, pebibyte.

petabyte (noun)	PiB (noun)
a unit of information equal to 1024 tebibytes or 2^50 bytes	a unit of information equal to 1024 tebibytes or 2^50 bytes
a unit of information equal to 1000 terabytes or 10^15 bytes