The OS is built differently though with a different software so more ram is needed. Doesn't mean that's a bad thing.To me it speaks volumes, when a phone that has more ram and higher specs than last years iPhone, does worse in a speed test. I agree it's not everything, but there are people who go by specs and will say things like "the Note 7 has better specs" which on paper it does, but in really world tests it can be a different matter.
Real usage does matter and I will compare my 6s plus to the note 7 when I get mine. If it lags and performance is bad I will return it but my S7 edge I had no issue with.