Yup, it's all the same Android is totally on par with iOS yet somehow the battery life on a typical iOS device with actual real software installed and used frequently results in far higher battery drain than on iOS.
Sure, the GPU is integrated now, but the graphics still chug on a Note 3.
Sure, if you unwrap any two android and iOS devices they will be on par, ask two heavy android/ios users how long their battery lasts and you'll get vastly different answers.
There are plenty of places where just these questions are asked, and answered. For Android I'd suggest looking around the xda forums. For reference, I use an oldish (launched in 2010) Android device (Motorola Defy) running Android 4.4.3. The battery generally lasts for 3-4 days before I get a low battery warning (meaning 14% left). Had I loaded the thing with constantly updating all-singing-and-dancing apps and widgets I'd need to charge the battery every day. Doing absolutely nothing the battery lasts for 28 days (from 100% to 2%). And yes, there are differences between Android devices, just as there are differences between cars and televisions and chainsaws and any other device which is produced in an open market.
Sure, the GPU is integrated now, but the graphics still chug on a Note 3.
Sure, if you unwrap any two android and iOS devices they will be on par, ask two heavy android/ios users how long their battery lasts and you'll get vastly different answers.