The hard product on the DL 330's beats the VS hard product, but I prefer the soft product on VS. Both food and service.
I tend to take DL heading to Europe, since I will mostly be sleeping, and VS back to North America since I will be awake and can enjoy the service more.
The "suites" are really not much better than the existing 332 and 333 hard product on DL. And the A350 suites, with no air vents in the non-window seats, is a big negative.