For experiencing android you have got a lot of options in the market but iOS is unique in its own way. thats why you have to pay more for apple products.
some new features which are included in iPhone 7 plus
WATERPROOF: apple claims it to be ip67 water proof . means it can handle splashes without any problem, but I would not recommend you to submerge it into the water
FRONT FACING SPEAKERS: the new front facing stereo speakers sound very nice
DUAL CAMERA: you are getting two rear cameras for getting the depth effect similar to DSLR
and one last thing, absence of 3.5 mm headphone jack. for some people it may be a drawback for me its not. bcoz I rarely use headphones while charging, and apple is descent enough to provide that normal headphone connector with the phone.