Difference between 〜といい〜といい ＆ 〜といわず〜といわず?

Question

Can somebody explain the difference between these two expressions? I have pasted the definitions and some examples from 日本語表現文型辞典 to help but they seem to come down to the same thing. (When can one be used but not the other and why?) > といい＝も= both...and：speaker gives evaluations by enumerating several examples to show that result is the same from all angles eg: 運動といい、勉強といい、僕は何をやってもダメだ I am no good at sports, study or anything. >といわず=も=not only..., but：strongly emphasizes by listing several examples that cannot be distinguished. Also can mean everywhere, always, all etc eg: 日本人は子供といわず、大人といわず、漫画をよく読む。 The Japanese, adults and children alike, often read comics. 手といわず足といわず、子供は体中泥だらけで帰って来た。 They came home covered in mud from their finger tips to their toes. NB These are my translations using what I think are equivalent colloquialisms.

Answer 1

「XといいYといい」「XといわずYといわず」means "XもYも/X too, Y, too、also X, also Y, They indicate to list more than one event at once and this also indicates that there are other more hidden events than those overt events.「といい」indicates to pick X (studying) and Y (sports) from someone or something.

On the other hand, 「といわず」indicates that you cannot pick only X and Y. It strongly indicates that we look at "the whole thing",thus, it means "anywhere and everywhere". The child's entire body is covered in mud. "He is covered not only hands and feet but also his entire body, all over his body!" In this case we look at his "entire body". Here is another example. 日本人は子供といわず、大人といわず、漫画をよく読む。 The Japanese, adults and children alike, often read comics. In this case, We are looking at "all Japanese people" .