A380. The Concorde was horribly expensive to fly in and the cabin was very tiny and claustrophobic. As well, the windows were so tiny they had may as well not even have been there.
Concord because it was seen as something special or luxuries to fly on one + it would be much faster and I prefer getting to my destination quicker unless I'm on a classic aircraft then I would enjoy the ride.
CONCORD been on it not bad at all it was built to go transatlantic fast and the yanks couldnt build one so didnt use it but you did not get jet lag in it