I think most of us love these planes, I sure do.

In terms of temperature control, noise, air quality, etc, I don't think you will notice any big difference between this a/c and other Delta planes aside from the A350, which is brand new, and maybe the 737-900, although the seat layout of that a/c is so terrible that most hate it.

The very newest planes in the industry do have improved noise and air systems, like the 787, but the vast majority of DL's fleet is older as DL tends to invest in refurbishing older planes rather than buying new and you won't notice a big difference between them. Maybe the A330 is a bit quieter. As DL and other air lines bring brand new planes on line these differences may become more noticeable.