People who using Oscilloscopes for troubleshooting electrical problems and electronics repairs probably will not throw their hat in the air when there is a noiseless vertical input voltage specification of 640uV.
But no one can predict the needs of people who possibly will act as product developers.
Definably the oscilloscope with noiseless inputs it has a small advantage in ripple measurements.
And here I will do an quick vertical sensitivity comparison between latest GW Instek Oscilloscope series and of some other vendors.
In this quick listing below the numbers speaks by them self's.
GDS-2000E = 640uV
GDS-2000A = 1 mV
GDS-200/300 = 2mv
Rigol DS2000 = 1.2mV
Keysight DSOX2000A = 1.8mV