Which is more polite?

English as a Second Language Listening, speaking, pronunciation and accent
1

Hello,
Which is more polite? B1 or B2?

To a friend:
B1: Would you like some juice?
B2: Have some juice.

2

Obviously the one where they are given the option!

3

Can you explain this to me please?
Because I have read in my book that the utterance “Have a juice” is a directive and involves a benefit to the hearer. ( I don’t know if they mean that it is more polite)

4

Don’t you think it is more polite to give someone the option to have something than to demand they have something?

5

Thank you Beeesneees,
I can say no more than you are the best active person helping me here.