Here’s the conversation from another time this came up;
Oval Chainring Question
If the price is the same or very similar for the oval, then that gets my vote. It’s a subtle difference but if you’re already upgrading it’s the perfect time to try one.
I generally go for a 32T, but it depends on the bike, where you ride, and your fitness. 30T - 34T would probably be the norm for a trail bike.
I usually go for good quality parts from known manufacturers. If the price of an amazon chainring is substantially cheaper than a Raceface or similar one, it may be worth the gamble to try and see how it works, but if it’s not that much cheaper I’d go for a known company.