Help Please. Can someone out there who has used both the Kubota ZD 28 and the Scag Sabre Tooth Diesel please tell me the key differences, advantages, disadvantages between both? I am about to upgrade equipment and have narrowed it to between these two mowers. I need to make a decision very soon and want to be the most informed. Let me know your thoughts, good or bad, on either. Both have the six foot deck.