Does anyone have experience with the Toro or Exmark 30" inch commercial mowers? One thing I noticed is exmark states a single speed transmission and toro states variable speed. I'm guessing it's variable by slipping the belt which seems to me like excessive wear on it. Just something I never thought to ask about when I was looking at both of them recently. They are noticeably heavier but balanced fairly well. I know toro owns exmark, but do they put a little more quality into the toro? Just curious.