More RAM means something. In OnePlus 3T, I never had to deal with app reloading. And that makes a phone WAY faster then phones with less ram. Only iOS can do well with less RAM, since it has great memory compression.
Just look at this. Two same phones, but look at the difference:
But what I would love to see is, does S8+ with 6GB of ram hold those apps in memory even after 30mins. In my experience with (lousy) samsung memory management, it is way too aggressive. Most apps aren't kept in memory after a short period of time, even though there is a lot of free ram left.