The most important question always boils down to: how long have you used them?

If you've been using the your old pairs <insert literally any headphones> for years on end, and only just listened to these <again, insert literally any other headphones> for a few hours, then give it time. Listen to the new ones exclusively for a week or two on end, and then go back to the old ones to see if you still feel the same way.

The advice is generic and mundane in nature, but it's tried and true to root out any preconceived biases, and to give the new pair a fair shot.