All things being equal the MRB move less ground and don’t pull rocks. The MRB also are prone to plugging with straw between scraper in heavy straw or tall stubble. Also all the moving parts. I don’t think we sacrifice with the shanks, and they are trouble free, zero maintenance. We would replace mrb discs tines and scrapers every 2nd year - we did 3 seasons on the current MRS opener and will get a 4th next season yet. Next drill we buy will be MRS as well. Only thing I don’t like is it takes longer to set the depth, no quick change method - take bolt out and move assembly down.