I've used the Galaxy S6 extensively testing it out but I haven't had a chance to extensively test out the edge variant. Near same specifications between two models. The edge display is absolutely stunning but as of now it doesn't have a ton of useful functions...more of a gimmick. I like how customizable android is but the problem is I don't do much customization anymore. The S6 is fast and a great device by almost every measure but for what I use a phone for i've been much more happy with my iOS devices. Leaving Mac OS X is out of the question for me, and apple makes the best tablets bar none...so it's only logical for me to use an iPhone to tie the ecosystem together. Android and iOS are very competitive in 2015 but i'd personally get what feels right to you. Since you use other Apple products it kind of sucks you in and the familiarity you speak of i'd go back to iPhone. It's all what you feel comfortable with regardless of OS.