My understanding is that "vrei" is "do you want" and "doriţi" is more "would you like". I am happy to be corrected.
Saying "Do you want" in English sounds pretty rude... the right translation has to be "Would you like".
MarkFuller7 that is also my understanding from multiple learning resources.
this question is totally nonsense. How could someone prefer a juice?
Duo is really far from reality...
I heard:"Doriți un suc sau bere?" which is logical, because one never drinks just one beer... ;-)
This should be: Do you want A juice or A beer... even the translation on this page says so.