Which graphics card should I buy? 6750XT or a 4060?

I’ve never really understood the differences between AMD and NVIDIA graphics cards. I just did some research and both cards are going for the same price and are exactly within my budget. I didn’t want to spend more than 2,000 reais. They’re going for 2,500.

I’ve heard that AMD runs very hot. Is that true? Which one would you buy if you were in my place? Which has the better performance? And is the price good or should I wait a bit longer?