Honestly any seat photo's would hardly be better or more descriptive than the photo's available on each airline's website as far the subtle differences between 9W and CX herringbones.
As I said - 9W seats are wider and with more space to keep stuff. Also dividers are slightly lower so they feel less claustraphobic when you get in them than the CX seats. What I love about CX is the high level of privacy and the length of the bed. The factor in this is that 9W has airvents along the window wall, where as CX has foam padding - so when the seat back reclines it is received into an area that makes the bed wider at the top...
Basically wider bed vs. longer bed... the big difference however is the soft stuff - 9W turns down your bed with a very nice blanket, large pillow etc - service often reserved for First class - and this makes the difference...