For strictly self defense, I gotta agree, that it just depends on your style and personal preference. (No use repeating what Bquinlan has already stated) The Maxx is one helluva thruster, and aint half bad with a tip rip either. The CS has them wicked serrations, and the equally impressive belly. (BTW I do think the serrations are incredibly cheesy looking...kinda like the Ginsu 2Ks we used to see on television at three in the morning, but they DO work well. Usually what I suggest for people not willing to learn knife sharpening.)
But the rest of the time when ya' aint slashin', hackin' perforatin', an' vanquishin' bad guys.....
DEFINITELY the Maxx!!
Blade material: Maxx- D2 VG-AUS 8
Handle material Maxx- Titanium VG-zytel
Lock: Maxx- framelock VG- Backlock
Pivot Maxx- HUGE VG- adequate
For the price difference, I think the Maxx is a better choice. Also, the Maxx is very easy to use for day to day tasks...really! much easier than you'd think for a knife that size. It's easier to use than alot of 3.5 to 4 inch blades I've owned. It's also very easy to maintain the straight bottom edge on the Maxx. It also deploys very quickly with the quick flick guards, and can be made even quicker if ya' reversed the clip for tip up carry. It's also very flat to carry in the pocket, and it IS possible to forget it's there once ya' get used to it. Also, bear in mind that since it's such a fantastic knife at most every day to day task, it basically bonds you more tightly with your knife. (I can't speak for the VG in that scope, but I can say that the Maxx is overall VERY hard to beat) The one area I've found where the Maxx leaves some to be desired is the slick titanium handles, which is a problem quickly rectified with a littlebit of skateboard tape.
I think if it were ME choosing, one thing that would push me to the Maxx is that big ole sturdy framelock. DEFINITELY gives a strong feeling of confidence. Don't even wanna remotely consider either of those blades closing on my forepaws....
Overall, if you're lookin' for nuthin' but personal defense, there's possibly some debate open. But as a day to day tool, I'd say the Maxx would win hands down. Sorry man, but I think it's simply a better tool, and the best bang for buck value in the knife market today.