MB vs MiB

MB and MiB both are nouns.

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

As nouns, MB and MiB are synonyms defined as:

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

Other synonyms of MB include M, mebibyte, megabyte.

MB (noun)	MiB (noun)
(a British degree) a bachelor's degree in medicine	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