Rim width question for high power EEB

I ride mostly on the street/roads with a QS 205. Both rims are 19" x 1.85" with the same type of tire.
Is anyone running a 1.6" on the front with a 1.85" on the rear with the same type of tires on both rims? Im just wondering if theres any noticable difference.

I don't think there's anything to be concerned about with having a wider tyre on the rear if that's what you're asking? I never noticed any drawbacks