Are all deck belts created equal?

Hello all, new here and like this site after browsing a bit. I have a Toro lawn tractor that needs a deck belt. After shopping around for prices, seems that the price range has a very large window which leaves me questioning the quality of the lower priced belts. Part# 112-5800 {V-BELT}. Prices range from around $12.00 with free shipping to $49.00 at my local toro dealers. Are all these belts basically the same quality or should I stick with OEM for the $49.00??