megabyte vs MiB

megabyte and MiB both are nouns.

Word	Noun	Adjective	Verb	Adverb
megabyte	Yes	No	No	No
MiB	Yes	No	No	No

As nouns, megabyte and MiB are synonyms defined as:

megabyte and MiB: a unit of information equal to 1024 kibibytes or 2^20 (1,048,576) bytes

Other synonyms of megabyte include M, MB, mebibyte.

megabyte (noun)	MiB (noun)
a unit of information equal to 1024 kibibytes or 2^20 (1,048,576) bytes	a unit of information equal to 1024 kibibytes or 2^20 (1,048,576) bytes
a unit of information equal to 1000 kilobytes or 10^6 (1,000,000) bytes