Есть ли разница в употреблении "А few" и "several"?

Словари утверждают, что several - это чуть больше, чем a few.

Couple is used to refer to two things, but is also often used for a small number greater than two. Few is used the same way as couple and also for a number slightly greater than a couple. Several is usually used for a number greater than a couple and a few. Occasionally it is used in the same way as couple and few.