Chopped tomatos are one of the few things where the supermarket own brand versions are mostly crap vs the branded ones. If you're making heavily seasoned dishes like curry then the difference is less noticeable, but if you made a tomato pasta sauce then the difference is stark.
Waitrose, Aldi, and Lidl own brand tomatoes are all good but not great. Personally use Cirio chopped tomatoes which are usually on offer, and Mutti for any kind of tomato sauce. In the grand scheme of things its a very small premium (+20-60p a can) for a big difference.