I used Acuvue 2 contacts for years and they were great. I used to be able to sleep in them (with my doctor's ok, of course). I changed to Acuvue Advance, and they are a little better at night (when I got tired the old ones would get cloudy). But they weren't all that different.
I recently went to the eye doctor for the first time in over a year. I have astigmatism in my left eye that was getting worse. He tried three different contacts for it. All were great, and the last one is the best. Now in my left I'm using Acuvue Oasys for Astimatism, and the right is still my Advance. He tried me with Oasys, but there were the same as Advance.
Everyone's eyes are different. One lens may work great for one person and terrible for others. That's why we need to take the advice of the doctors.