What is the difference and what applications prefer what tire? Anybody have any preference and why? Thanks for any and all help

I like the 90 in a 4.50 or faster...IMO

3190

3190 in my opinion. Compound is slightly different the 3191 is better for a dragster running 470s or slower

You will love either tire IMO...

Hopefully you are running these on Bead Locks.

I have run the 3190W for a little over 3 years now. Had them on cars going 4.90's to low 4.40's and they worked great no matter what car or et it ran. I have never tried the 3191W.

Thanks guys. I got a set of 3190. I had tried the 3191 a couple years ago, but on a regular wheel with screws. These are going on beadlocks. I hope I like them better