My Mrs has an S (I have the X) and there's not a huge noticeable difference. She plays on a 24" 1080p monitor. (While I use the 58" 4K TV). It's an amazing bit of kit, especially for the price. And GamePass is a steal.

Personally I haven't found my PS5 to be worth it all. The interface isn't as nice and the exclusive games aren't my bag.

Get a series S. I don't think you'd regret it.