The CK20 has a higher hydraulic flow at 7.66gpm, the 4110 is 5.1. This will give faster operation of a loader, etc.
The CK20 weighs more, good for better ground engaging, within limits, and hauling logs (which I do all the time).
The loader valve and joystick come standard on the CK20, I believe it's extra on the JD.
They will both accept a mid mount mower.
The JD supposedly has a little advantage in PTO HP at 17, but it is not clear if this is the HST option or the Geared version.
I was only able to find the JD info on tractordata.com as it appears not to be on the JD site, discontinued?
While both of these tractors are very good, and will do most all you want, I think the CK20 will do more. That, and a good deal less price at the time, was why I chose the CK20 over the JDs that I tried out.
John