For what it's worth, the two DVD players aren't even close to one another, and the Proc Amp settings for the DPS-470's test signals don't work well for either player.
http://s7.postimg.org/qczp2gr57/D_KR4_1.png
http://s7.postimg.org/vpojglf1n/D_KR4_2.png
http://s7.postimg.org/t5swmhrhn/DVP642_1.png