Indeed at 0V it shows Keysight is better,at 3.13V its match,then at 30 second+ the keysight pulls ahead,but at 10V the Keithley is better,both short and long term!
Just look at the graph! The keithley in black is under the red keysight curve! So at 10V keithley is better and this autozero problem doesnt make it inferior like when measuring 0V,whitch is short.
My point is,as a person that want best dmm to measure 10V,I should not be put off by the poor 0V noise of 7510 since at 10V its better than keysight,or I am wrong?