Actually, the fanservice in CG is pretty well-done for its genre. The teasing shots of the girls from various angles were fuckwin in my book.
Now, comparing that with Kanokon: Kanokon seems to be attempting to fill the gap between fanservice and hentai and fails awkwardly. Fanservice only works if the audience actually likes the character, but face it, the girls in Kanokon aren't well-liked. Put them up against Geass girls, or to be fairer, To-Love-Ru. I've seen much, much more TLR related content on /a/, /w/, /h/ and /e/. Case in point, I didn't even get aroused throughout the entirety of Kanokon and its masked h-content (durrhurr heart-shaped stickers over nipples is SFW) yet the ass-shot from the latest Geass did it for me.
Sure, people have different tastes, but Kanokon is definitely all-time fail for me; how it tries so hard with its fanservice yet fails so miserably.
tl;dr - CC's ass > fox slut's naked tits with heart-shaped nipples