Last year, the decision between Galaxy S8 and S8+ was solely down to size. This year, however, Samsung's flagships have more significant differences and the price difference between the two is larger. So, having been voted top flagships of the MWC as a couple, let's break it down and pick the best individual phone. The size is different, yes. The Galaxy S9 has a 5.8" screen, the Galaxy S9+ comes with a 6.2" display. Both have 18.5:9 tall aspect ratio and no notches. The Galaxy S9+ brings the series' first dual camera. Both 12MP sensors get OIS, one lens is wide-angle, the other is...
Source: https://www.gsmarena.com/weekly_poll_samsung_galaxy_s9_vs_s9_sibling_rivalry-news-30015.php