I'd agree there is real wicking going on, just no way to for me to say how it compares to the diff grades of SS mesh. I suspect it's less from trying to do vertical burns with the ceramic.
The only obvious visual difference is the FC-2000 is a darker shade of grey. I looked at both of them side by side under 2x and 10x magnification and my eyes couldn't see a significant difference between the pores of one vs: the other. Even side by side under magnification to me they looked basically the same.
No, I'm not saying either performs better than the other. The outstanding feature that makes either work, is getting the coil snug for it's entire wrap. From my use of both - one (either one) will perform better/worse than the other depending on the coil not the wick.
I can say, that I can easily see a difference in the 'outside' wicking of the my thinner .120" DIY wick compared to the .125" FC-2000. For me it's easy to see the juice wicking up the outside of the thinner wick when the wick is dry and PV held horizontal. Even when doing back-to-back max burns i can see more juice on the thinner wick. Sometimes maybe too much, as I can see it bubbling between the coils. It may be 'too' much as I'm burning/boiling the juice between the coils, kinda flooding the wick.
Now that might be an advantage for extreme vapers w/ low ohms and high watts (more juice fed to more heat). I'm not one of those, I like my ohms 1.8-2.0 and vape about 4.2 volts on a Provari. So for my use/style normal ( and even 3-4 chain vapes) the vape is quite comparable.
The only advantage I could really say the PetSmart DIY wick has over the FC-2000 is cost. If you can fashion your own, I get 12 wicks from a $4.00 medium size stone. That's about 33 cents each. And so far for me, the higher priced FC-2000 doesn't out perform it. Is one safer to vape based on it's construction and materials - I've no clue.
Hope this clarifies my experience with both of them.
edit: here's a link to the best large sized picture I could get.
http://i1095.photobucket.com/albums/i466/MikeEbner/Posts/IMG_1497-2_zps871e2670.jpg