Can s7 Wall charger be used on s8? Can I use Samsung Galaxy s7 wall Charger on S8?

I'm concerned about damaging the s8. and could not find real solid specs online.
Samsung says 


  ....You can charge your phone using any Samsung-approved wall charger, but charging speeds may vary depending on the charger....


Further this reddit claims that S7 and S8 use the same charger

I am not sure what is the difference in charging speeds

In the absence of specs , it is not possible to say for sure, but I wouldn't hesitate since both chargers are Samsung and apparently similar as pointed in the reddit.