If I had to make a choice I'd buy the Exmark. The spec's on the mowers are not really identical, there trade offs on both mowers, the only thing I can see that the Kubota has over the Exmark are the 3100 drives but it has a B&S engine which isn't worth having. (JMO) The exmark has the Kohler ZT710 which is a far better engine than the B&S but it has the 2800 drives which are top end residential drives but they would be more than sufficient for what your mowing. Personally if I were spending the money your spending on those, I'd go a little more and buy the Hustler Fastrak 48, you'll get the Kawasaki engine which is better than both of the others you'll also get the 3100 commercial drives and little better BTS and a far better built mower, but like I said JMO