This is so awesome!!!
Been a loyal Mi fans since Mi3, but Mi4 and Mi Note (flagships from Xiaomi) nothing surprised me.

Then I bought the awesome S6 (the only problem is poor battery life).

Now I am thinking which one should I go for.
S6
-best smartphone camera (not sure how Mi5's, but aperture is smaller than S6)
-best display panel (2K + AMOLED)

Mi5
-more powerful processor (Snapdragon 820)
-MIUI
That's all