7700x or 9700x?

Think about getting an RX 7900 XT for gaming. Should I pair it with the 7700x or 9700x? They're both the same price, at least on amazon. Shouldn't I go with the higher number? The 7700x does have a higher processor speed and the 9700x uses less power. Bonus question: Which cpu if I end up getting a 4070 Ti Super? I'll play a handful of games but I play a lot of competitive games. Thank you for the help!