We’re looking in purchasing a Maschio speed disc. Can anyone explain the practical differences between these two models: UFO and Presto/Veloce? They seem to be the same weight. The discs on the UFO from the picture seem more offset. The HP requirement is much hire for the UFO as is the price. We’re looking to purchase one disc that will mainly be used to till in Cover crop and crop residues. The disc will be pulled by a Kubota M7-152 and our soils are very light.