By now, all the phone OS out there can give you the same experience.
And by experience, I mean the end result of using the OS feature or the OS+App together.
Sometimes one phone will have one type of app, another will have a different one for the same experience.
Also, one phone might give you one or two different experience which another phone might not.
But, on an average all the 3 major OS will be satisfactory for most of the people.
Google Docs claims is that even if it has only small subset of features compare to Microsoft Office, those are the most commonly used features by the most common people.
In the same lines, common man doesn't need all the 900K apps in the Android or iOS world.
What you need, you have got in Windows Phone (either official, or equivalent).
So, instead of feature comparison, go for the phone, whose OS looks beautiful and smooth.
The one, which you can confidently take out in front of friends and strangers.
If it is iOS, go buy iPhone.
If it is Android, go buy one.
If it is Windows Phone, welcome to the group.