Slim version is a light version of the old PS4, which is thinner and lighter than the old one, but there is no difference in actual use.

Pro is an enhanced version of PS4. The old version of PS4 supports 1080P screen output at the highest, and pro supports 4K at the highest, so the game quality will be better than the old version. Pro-supported games will have a high-quality patch, but the price of the corresponding pro is also more expensive than the old version, and you need a TV or monitor that supports 4K, otherwise it is useless for you to buy pro.

The price is the old version of pro (display device supporting 4K) > slim & gt, so consider it according to your own situation.