ryzen 3 3300x vs ryzen 5 3500

Which will be better , 2 physical cores or 2 extra threads? Plus should i wait for more b550 mobos to arrive or should i just go with b450? Thanks for your suggestions in advance.

Hi good morning... I hope someone can enlighten me on which one to get between these cpus. I am planning to build my son his first PC. He's a kid so most probably he will be using it for gaming but I also wanted the PC to handle minor school stuff like a bit of photo and probably video editing...