There is nothing on an iPhone that someone else hasn't already done and a lot of phones have everything on an iPhone except iOS and have some mind blowing features Apple hasn't even started on yet.
It's probably true that for most features, some other company has already introduced it. Apple gets a lot of credit for bringing innovations to the masses which likely have been seen elsewhere. And that's been true for decades.
But that's not necessarily a knock on Apple, or something to underestimate. What Apple does is truly make the innovations mainstream because when they introduce a technology, it's not only at a sufficiently large scale to drive adoption, but generally it is well thought out and works well, so widespread adoption (even beyond Apple users) typically follows. (It should be obvious but I'll point it out because not every Android supporter seems to appreciate this, but just because a particular new feature shows up on one or two Android models doesn't mean that EVERY new Android model also will have that feature going forward.)
Beyond that, Apple has been able to maintain profit margins, so they put a lot of effort and engineering into having something that's not going to be a drain on their profits, and sometimes that means the feature is introduced later rather than sooner. BTW, you see that a lot with their use of new materials and manufacturing processes. Apple might do research into these types of technologies for years, but don't rush to introduce something new until they know they can do so at scale, and still retain their margins.
Many of Apple's competitors seem to be in a rush to throw things on the wall to see what sticks, with not a whole lot of thought towards usability, and in some cases how they can make profits on these novel features. It's not a coincidence that Apple dominates smartphone profits.
The other part of this story is that a lot of 'spec. advantages' that Apple competitors cite are actually in part necessary to keep up with or beat Apple, and in some ways can be a liability. For example the following article does a good job discussing how Apple is able to present a formidable challenge for its competitors, even if the specs on the paper don't look particularly daunting.
http://www.theverge.com/2016/9/12/12886058/iphone-7-specs-competition
Many Android devices need to use chips with more cores and higher clock rates etc., and use more RAM, and draw more power etc. etc. just to keep up with what Apple can do, because Apple puts greater emphasis on tuning and optimizing their hardware and software, which they can do because they design both, including the chips.
Unfortunately I think we're starting to see the consequences of this with the Samsung Note 7 battery fiasco. All these high capacity batteries and fast charging etc. is straining the technology to the limits of safety. That and the fact that companies likely will cut corners because they are working with razor thin profit margins, to go along with a drive to be 'first to market' without a whole lot of safety studies is a recipe for disaster.
The explosions from Samsung devices (not just Note 7's) are scary. Just today I read about a flight on Friday that had a fire from a spare battery. Not sure if that came from a Samsung or not but this should be a wake-up call before people get killed.
Article Referencing Fire on Delta Flight 2557