Redmi note 4 is a great phone . Good battery backup, Nice camera , excellent performance . If you look at the specs of zuk z2 plus , you will get amazed with it at its price point but it has several issues . Most common is overheating and its battery backup isn't good . Rest of its features are somewhat equal to note 4 . I haven't use A5 so I can't give u any suggestions about it
I have Samsung J7 Prime and its good phone to buy. It has good performance , good front camera, battery backup is also nice . But I feel display is not that great :( And my friend has A5 2016 , its display colors are better and sharp .Also rear camera clicks better photos :-/
So I think both are good phones with own good and bad things. You can check comparison in this Link.