Looking at some answers and comments in this question, saying "Das ist mir egal" seems to not be very polite.

What would a polite way of conveying "I don't care" be?

A: Wollen wir heute abend zum Italiener oder zum Griechen?

B: [I don't care/it's the same to me!]

Edit: To differentiate to this similar question, the answer there notes that "Das ist mir egal" is used politely. But in the question I link to above, it notes that it's not quite polite. What's the difference? How would I use it politely?