Regarding SD835...... I have a phone with one. And one with 845. And tablet with 660. And there's no real difference in regular daily use. With demanding games or pure benchmarks, sure. But I'm using sheets in WPS a lot, on 845 phone and 660 tab and its the same speed. Tab is better because of bigger screen so the whole UI is different and easier to work with but even opening 20+ MB PDF files is equally fast on both SoCs.
The rest is within reasonable expectations too.