Software to compare the frequency response of two CDs?

[hvbias]

For comparing the mastering of two CDs to see the frequency response laid on top of each other - does anyone have software suggestions to do this?

Using Izotope RX I can do it for each individual file but I can't find a way to overlay them on top of each other to make it easier to read. Thanks!

 

[staticV3]

Deltawave
Room EQ Wizard
Audition

 

[voodooless]

Deltawave
Room EQ Wizard
Audition

Photoshop

 

[hvbias]

Deltawave

Heh, did a Google search of this and it brought back immediate trauma of memorizing Wolf Parkinson White syndrome EKGs as an MS3.