Are there any flip-flop hubs that has the same chainline distance for both the fixed and freewheel side?

I measured the distance of my EAI cog and the middle of the teeth looks to be 6mm from the base of the threads.

whereas a white industries freewheel center of teeth is 9mm from the base according to this site:

https://www.rivbike.com/products/white-industries-single-freewheel

or does does a straight chainline not make a difference at all?