That too, is pretty much redundant and highly predictable, don't you think? The Samsung S6/Edge design is heavily inspired by the iPhone 6 and pretty much follows similar design patterns that iPhone users already are accustomed to. The Samsung S6 Edge in particular sports the best aesthetics that currently exist on a phone, surpassing the iPhone 6's design, in my opinion. The regular S6 is on par, not worse, not better looking, whereas the S6 Edge tops them all at this time. I think quite a lot of gadget (and iPhone) geeks feel that way, if these forums are anything to go by.
I wouldn't say it's heavily inspired by the iPhone at all. I was always baffled how anyone could say the s6 looks like the iPhone at all except for maybe the bottom which does kind look like the iPhone. Otherwise the only similarities are the same as any other smartphone. Heck the iPhone looks MUCH more like a HTC smartphone with the aluminum and antenna lines.
BUt in relation to what you're saying I think it's simply a matter of quality, that feel in the hand that the iPhones have but Samsung hasn't had yet until now. At least external hardware quality, fit finish and build.