RAB won because it...
1) maintained its reputation as an offbeat comedy
2) contained only original content
3) has a steady fanbase
Spies was a close secon because it...
1) contained original and inspired artwork, effects, and animated cinematography
2) told a clever and gripping story
3) unfortunately contained only copywritten audio
4) unfortunately based itself around Coldplay, a group whose popularity has alread inspired a number of music videos here on Newgrounds, reducing its topic originality a bit.
The way I see it, RAB with the sound on was better than Spies with the sound off. But I really enjoyed Spies, and I honestly hope to see some awesome stuff from wittyhobos in the future.
P.S. - Shameless self promotion. Who noticed that I sneaked a cartoon in there? :D