Very useful, thanks. I did have a couple of thoughts on this.

I think that this is a comparison of credit cards that can be applied for now. But those of us who have existing Avios-earning credit cards that are no longer available to new applicants would want to dig out our terms and compare them to these. I wonder if that might be worth noting.

The Tesco card is technically called something like a Tesco Bank Credit Card, isn't it? Whatever it is, it might be worth distinguishing that from the Tesco Clubcard which is the basic Tesco loyalty/rewards card.

Finally, I don't think that there's any RFS on long-haul (or longer short-haul) destinations, so "WT return RFS to New York" doesn't exist - nice though that would be.