to each one vs each

to each one is not an adjective while each is an adjective.

Word	Noun	Adjective	Verb	Adverb
to each one	No	No	No	Yes
each	No	Yes	No	Yes

As adverbs, to each one and each are synonyms defined as:

to each one and each: to or from every one of two or more (considered individually)

Other synonyms of to each one include apiece, for each one, from each one.

to each one (adjective)	each (adjective)
	(used of count nouns) every one considered individually; quantifier, singular, universal pronoun; quantifier, singular, universal

to each one (adverb)	each (adverb)
to or from every one of two or more (considered individually)	to or from every one of two or more (considered individually)