What is the difference between ideal customer profiles and buyer personas?

Ideal customer profiles are for business-to-business sales teams, while buyer personas are for sales teams that sell directly to consumers.
Ideal customer profiles broadly describe a target market, while buyer personas define specific sorts of people in that market.
Ideal customer profiles describe your existing customers, while buyer personas are based on your leads and prospects.
Ideal customer profiles are used by marketing teams, while buyer personas are used by salespeople.