The difference is quite substantial.
Вести means 'to lead, to make somebody follow you, to drive a vehicle':
Он привёл их к деревне. — He led them to the village.
Приведи нас к нему! — Take/Lead us to him!
Нести means 'to carry', принести means 'to bring, to fetch':
Принеси мне воды! — Bring me some water!
Я принес вам Слово Божие. — I've brought the Word of God to you.
Every dictionary explains the difference.
