Difference in Wear Between Front L&R Tires

I blew-out the front right tire on my Gen 2 in a serious pothole, so I bought a new replacement (same mfg, make, model, size, etc.) BUT... now there's a 13,600 km difference in wear between the two front tires.
Q: Given the (slight?) circumference difference between the new R and 'old' L front tires, is that a problem for (the front differential or anything else)? I could put the new tire on the back R, and put the back R on the front R (so they're identical in wear), but I'll have to rotate the tires eventually.
Thanks!
I didn't find the appropriate place to post this question, so my apologies if it's in the wrong place.