I've been testing a bit this weekend. 500hz mouse/xim feels way better than 125/250hz in my opinion. This is on Xbox though. I'm basically using the same config but tweaked for 1800dpi and 1.30x ads.
Tried every single combination thats possible.
For XBOX ONE X
125hz XIM/125 hz Mouse = Meh
125hz XIM/250 hz Mouse= Meh Used G502 Hero. My mouse doesn't have 250hz
125hz XIM/500 hz Mouse= OK
125hz XIM/1000 hz Mouse= OK
250hz XIM/250 hz Mouse= Amazing Using G502. " "
250hz XIM/500 hz Mouse= Amazing
250hz XIM/1000 hz Mouse=Good
500hz XIM/500 hz Mouse=Good
500hz XIM/1000 hz Mouse= Good
1000hz XIM/1000hz Mouse=Great
All Polling rates tested at High Dpi. 16k-20k Dpi
I'm trying to understand why a lower hz than the maximum is better? Is it specific to this configuration? I have the same mouse if that makes a difference.
It really falls down to personal preference. If you just follow disables config I can assure you it is one of the better configs in Warzone. I did these tests in multiplayer. This is just what I have felt using these poll rates. One is not better than the other. Personally I use 500hz XIM/1000hz Mouse in warzone at 20k dpi. This works better for me.
125 xim and 125-1000hz mouse is the same
250xim and 250-1000hz mouse is the same
500xim and 500-1000hz mouse is the same.
You will get more AA with lower polling rates. You will get slightly less AA if you raise poll rates. I notice a slight difference having my mouse poll rate higher than Xim poll rate.