Either machine will do you well for as little as you are mowing. You can not make a bad choice here. With all that said, the 2015 Gravely Proturn is a better machine because of the drives it has and it is as close to a commercial mower you can buy without moving up to that price point. Not a huge fan of Kawaski. They cost too much to fix. My mower just lost the starter and the OEM starter is 485.00 plus shipping even from the local shops. They are going to charge shipping too.