I noticed in google that Drakon once posted a thread about his RGB modded AV famicom - he compared captures of his composite and RGB outputs to show the clear superiority of RGB. I was curious since my composite signal didn't look very crappy like Drakon's did on my AV modded Famicom, and upon capturing discovered that Drakon had the black levels all wrong on his card!
Here's some updated comparisons. I personally prefer the composite to RGB, because the colors are right and the fringing artifacts the NES had are still there.
I captured from my AV-modded original Famicom. It's not a AV famicom, but it used the AV famicom's circuit for amplification, so it should behave the same. I suspect either his capture device is bad or he doctored the images. Inclined to think that (despite my low opinion of Drakon) even he isn't that low... so I am assuming he has a bad device for composite captures. Since the famicom outputs 0 IRE black (NTSC-J), there's no real reason it should look this bright.
Don't know if you're interested, just thought I should do it... for great justice.