A:AnswerYes you can as it is backwards compatible. Just keep in mind with some games you may have to use a ps4 controller. Some you can use the ps5 pro controller.
A:AnswerIn reality absolutely nothing that's worth another $500+ 300. Yea they beefed up the GPU little bit which will translate to nothing to very little added an upscaler which will do nothing to very little because it's also the first generation so basically given developers another way to be lazy so they don't optimize their games correctly. I can tell you that the PS5 Pro is the absolute least worth it console on the market today. It is basically for the people that paid $800 or more for scalped ps5s back when it released. DON'T GIVE SONY YOUR MONEY FOR THIS