A couple yrs back I was compareing the B7510 vs the CK20 and as far as the test drive went, there wasn't any appreciable difference between them. The FEL operated similarly, the ground speed was about the same, their ability to climb inclines was the same also. Both HST's whined about the same and the operators station/ergonomics was about the same. Basically both machines seemed to be quite equal as I did nothing in the test drives to determine if weight would be an issue. Course in my case a lower weight is more benefitial.
In the end there was 3 reasons why I ruled out the Kioti CK20.
#1, The FEL hydraulic lines interfered with the pedals. I know that I could have probably tied them back out of the way but this made me question the "fit & finish" and placement of the FEL joy stick ruled out right side egress/degress.
#2, Price, The Kioti dealer (the only one within 75 miles of me btw) just wouldn't deal. I wasn't privy to any list pricing but I'm guessing he was trying to get list. The CK20 was pricing out a good $900 higher than the B7510 and this dealer was a good 50 miles away whereas the closest Kubota dealer was only 10 miles away. I made two stops at this dealer and he wouldn't budge either time.
#3, Presence, There just aren't many Kioti's around here. Matter of fact I've yet to see one working and/or sitting in a field locally. The dealer didn't have a CK20 reference I could talk to either.
$17K - 18K is big $$$'s to me and I wanted that "feel good" before I dropped it on a tractor.
So I went w/Kubota as it worked out better for me.
Ironically, The dealer that used to carry both Kioti and Cub no longer carries Kioti. He's replaced Kioti with Branson.
Determining what tractor brand to go for isn't a cut & dried easy decision. Each situation has differing requirements and determinators.
If one can wrench their own machinery then having a good dealer close by isn't as important as it is for one that wants the dealer to do scheduled their maintenance.
If one has lots of $$$'s then paying list for them isn't that big an issue where as it's THE important issue for those that aren't living in the large green
If one needs the machine primarily for ground engagement type work then a heavier weight is an important issue. If one's primary useage is for turf maintenance then a lighter weight is an important issue.
If one plans to do both equally it's important to realize that weight can be added to a lighter machine when needed then removed when not.
Most machines that are in the same size class are so close together in general capabilities that choosing a brand based on just the color and or it's particular look is generally a safe bet too.
There have been posters in this thread thats shown why they went with either machine and all the reasons were valid and good for them.
I recommend to go for the machine that best fits your primary needs and is the best deal.
Good luck