IMO I don't care for either one.Your talking about some big bucks & if it was me I would put the money to better use.Since you have a '08 model you better be careful on the fitment issue.
I'm not sure if these are applicable for an '08 but I would go for a front lip from one company, side skirts from another & rear skirt diffuser or complete rear bumper from another........a lot less money and these parts you can put on yourself with a help of a buddy. But that's just me!
Since your into carbon fiber....my suggestion for a front lower lip is the VeilSide V1, carbon fiber but it's listed for '06-'07 models. It looks real sharp! From Intense Power, they will deal prices over the phone.
I also like the Carbon Creations N-1 carbon fiber side skirts.
http://www.intensepower.com/cacrn1cafisi.html