Hahaha alamak how to say this...

Every model u ask got their pros and cons so u have to choose what main purpose for your gadget...
Like I choose pro M1 cause the big battery and gaming purpose.. Everyone choose M1 cause the big battery will make u less headache to charge battery every day.. It can last until 3 day and SOT at least can go to 10 hours and someone can go till 18 hours SOT...

Compare to M1 everyone said Redmi Note 5 camera better than pro M1.. And a lot specs that pro M1 does not have..

And last MI A2 u will get faster update cause listed in android one program and the camera was the highlight meaning camera wise more advance than redmi note 5
Zenfone 5z use flagship cpu 845 with 6gb 128 memory. Camera was their main purpose and budget below 2k...the great price when their launch in lazada juz cost around 1700 among the cheapest flagship phone can u get...