I started off shooting with the Panasonic AF100 for my DSLR stuff due to all the limitations of the 5D but in the end I found that the lenses and image quality of the 5D shines more even though its more difficult and less practical. If you are thinking about either camera take a look at these clips. I think both camera are awsome for porn but here are some pros and cons.
NO COLOR CORRECTION OR LEVELS WERE ADJUSTED THESE ARE RIGHT FROM THE CAMERAS
PANASONIC AF100 SAMPLE CLIP
Panasonic AF100
PROS -
No clip length limitations variable frame rates
Uncompressed audio XLR/Phantom Power
Focusing Tools solid pro outputs for monitors
Face tracking automatic focuc tracking
Practical handgrip for handheld shooting
CONS -
Yellow shift when over exposed
4/3 sensor doesn't get as much depth at wide angles
skin tones were difficult to correct and look yellowish in bright light
Overall I think this camera is great if I were shooting run and gun documentary style footage I would choose this camera over the 5D.
CANON 5D MARK II SAMPLE CLIP
Canon 5D Mark II
PROS
shallow depth at wide focal lengths
amazing 35mm like color and skin tones
Canon L series lenses with Vibration Reduction
shoots amazing stills
CONS
maz clip length 12 min
compressed audio cheessy fragile 1/8 jack NO PHANTOM POWER OR XRL
no metering for focus on monitor output
monitor output is cheesy and fragile min HDMI
This camera wins overall with image quality and amazing skin tones so I use workarounds and put up with the CONS for now until DSLRs evolve a bit more.