Are the PCB boards of the 4G & Wifi versions the same?

Does anyone know if the PCB board is the exact same for both the 4G and Wifi versions of the iPad 3? This is the part that solders to the audio jack.

Here is a picture of it attached to the audio part. I've circled the part that I am concerned about. I have also drawn a huge arrow to point at it. In case there is any confusion I went ahead and greyed out the stuff I don't care about, I also used the color red to make sure I am being clear. Thanks in advance for any help.

Image Credit:

http://www.thepartshome.com/media/catalo...