In my opinion, it was Fripp, who changed and developed Belew's guitar style and technique this way. This video basically shows, what guitar techniques and what playstyle you had to have, when wanted to be in King Crimson.
deathtokoalas
belew picked a lot up from fripp, but he never lost his more playful style - and it's something fripp desperately needed to counter his medieval dour. the biggest give away that it's belew rather than fripp is the presence of anything that contradicts the structure of the piece - be it a double time lick, an unexpected syncopation, etc. i love fripp, but the truth is that the man ticks like a clock.