Question about read accuracy of stand alone DVD/CD players

I am having a discussion elsewhere regarding the read accuracy of various DVD/CD players of varying price levels. My take is that when reading digital data from a disc and outputting it through HDMI, coax or TOSLink the differences are minimal or insignificant. Anyone here have any experience with this? Also, it there any software that allows this to be measured by routing the digital output from a DVD/CD stand alone player to a PC?

This all has too many vague points (hardware, firmware, PUH, other components) involved so you wont get a true answer, I fear.