Gravely Pro 460 V Toro Z Master 6000

I have about 10 acres with a bit of slope so after much research arrived at needing a wide mower with a good stance, good quality build and service within a short distance. That brought me down to two mowers.Gravely Pro 460 and the Toro Z Master 6000 60". I know there are many others that are just as good or arguably better but the service distance is a factor. Looking for differing points, Gravely has a shorter warranty, 3 v 5 years, Toro is more expensive, Toro has smaller motor, 27 v 31 Kawasaki. Apart from that they all look great build. What I dont have experience in is the transmission side of things. Is there a big difference between the two. Opinions on which way to go gratefully listen too. Cheers