The various differences between "either" and "too" will be explained with some examples so that you can have a better understanding of how these words are used. "Too" is an adverb, which means likewise. It is used to affirm that a particular feature or anything about object A is common to object B. For example, I like eating warm food, and my brother likes it too. It can also be used to contradict a negative assertion. In other words, this word is used in positive statements.
On the other hand, either can be used to perform the function of an adverb. As an adverb, it is used in negative statements. For example, He doesn't like me, and I don't like her either. As a determiner, it means anyone, especially when talking about two things. For example, you can do it either way. At times, when either is used, it goes together with "or." For example, Either you stay here till tomorrow, or you go now.
The word either is conjunction, adverb, determiner, or pronoun, and either is typically used as a determiner. It often refers to a choice that needs to be made, as in one or the other. For example, can you pick either green or pink? Sometimes either is used as a pronoun. Alone or with the preposition of as: Has either one of them been found guilty? In this sentence, either is used as a pronoun.
Either is used in affirmative statements, while too is used in positive ones. Also, on the other hand, it is used in positive and affirmative sentences. She can play the saxophone and sing too. Too is utilized to denote the fact that while one person is doing a positive thing, and the other person is also performing a definite something. For example, she likes hip hop and dance music, and her brother does too.