You can describe the results between the two new top-end cards in a sentence.
They’re pretty much even.
What is important to note is that both cards do much better than their immediate ancestors.
This means that unless the immediate ancestors start getting priced at basement-bargain prices really soon, you ought to focus on cards coming from this generation rather than the last when you get around to buying a new video card.
This does not mean, “Run out and buy one of these cards now.”
It does mean, “Run out and buy a card from this generation eventually.”