Husqvarna MZ611 and Ariens Apex 60 are comparable ride on zero turn lawn mowers in a lot of aspects. Main differences are the MZ61 has a 27 hp Briggs & Stratton engine, while the Apex 60 has two available motor versions, powered by a 24 HP Kawasaki engine, or a 25 HP Kohler engine. Both mowers are commercially rated and great for heavy duty work.