Looking for a Zero Turn mower that will last

I have less than a acre of almost flat land to mow. I have been looking at a Kubota Kommander Z122E-48 and a Exmark Pioneer 48'. They seem to be very identical in specs other than the engines. Kubota has a 22 hp Briggs and Stratton engine and Exmark has a Kohler ZT710. Does anyone have experience with either or both? Right now the Kubota is about $600 less in price.