It will always end up in debates whenever attempts to compare Xbox One S and PlayStation 4 Slim or vice versa are made. It is impulse for every gamer to look for the best console for fantastic experience but is there really huge difference between the two?
The problem when comparing two major consoles Xbox One S and PlayStation 4 Slim is lack of commonalities where they can stand side by side. For example, if a gamer will argue that there are plenty of titles exclusively on Xbox, then PlayStation lovers will counter that they too have exclusive games. At that point, the whole argument is futile. It will silt to the chicken and egg debate.
What sets apart Xbox One S over PlayStation 4 Slim is cross-platform functionality into Windows PC. Xbox Play Anywhere is something that PlayStation can't counter. Buy a title and run it on Xbox then go somewhere else and play using Windows 10. There will be no problem at all synching game saves so you can play with either device without losing game achievements.
Given the former premise an Xbox One S territory, then consider VR gaming a PlayStation 4 Slim forte where Microsoft have not threaded yet. There are rumors about project Scorpio but details are still vague. PlayStation VR is on top of the food chain simply because it is optimized for Sony products. Much more, PlayStation will be miles away in number of VR titles by the time Xbox perfected their own VR.
Citing these two major differences between Xbox One S and PlayStation 4 Slim, there are other fields worthy of exploration. See-saw comparisons like Xbox can play 4K Blu Ray natively but PlayStation has tons of Japanese AAA games will just result to a very long checklist. In the end it seems that comparisons might be pointless because the final verdict depends on what demands the gamers have.