I'm looking for big brands, not really sure if i can trust chinese smartphone makers.
Samsung hasn't exactly shown itself to be infallible.
Both Hawuei and Xiaomi have proven themselves to produce good products. You can change the launcher on the phone if their's doesn't suit you.
There is also HTC, LG, Sony, Motorola and Asus as options. Depends on your opinion of those.
I've only owned a Samsung tablet and found it to be clunky. I own a Sony Z3 and like it a lot because it's almost vanilla Android. I'm ready for an upgrade but I'm waiting until MWC.
I've never owned an iPhone but know lots of people who do and love it. I'm personally not an Apple fan but don't hold any grudges about people who are.
All MS software is available on both iPhone and Android including Cotana if you want. To get full Office you will need a subscription though.
As others have stated, it's up to you if you're ready to move. W10 on ARM might be some time away.