On a hardware level, the Galaxy Tab S is in a league of its own. No other series of tablets – iPad included – gives you such an outstanding combination of screen quality, lightness and thinness. On a software level, it has a few cool tricks up its sleeve as well. But there is that pesky lack of edge touch rejection, along with a tablet app library that still lags behind the App Store's. The Tab S 8.4 is an excellent tablet – one of the best around – and is most definitely worth a look. But for those reasons it isn't quite the no-brainer buy over the Retina iPad mini that it could have been.
Source : https://newatlas.com/galaxy-tab-s-review-8-4/32878/