Brockett, are you referring to both rims ?
Where did you hear / read the rims don't match the tyres ?
Fitting wider tyres on a standard rim will pull them out of shape and make the contact area more rounded and higher , this should make the bike turn a little quicker but in my opinion is not beneficial at all
As for wear rate, no the tyre should wear the same but you'd struggle to wear the edges out as they would be pulled to far over the rim for you to reach.