Obi Wan vs Count Dooku-Obi Wan lost because Dooku was familiar with his form

"Palpatine summoned the dark power and transferred it to Dooku who felt his cells bursting in such an amplification he had never felt before. The power that swelled could not be contained forever and so the shadow let loose a small fraction of it through his vocal chords "ye!" he cried and Dooku used that power to grip Obi-Wan tossing him idly aside." -- ISV's copy of Matthew Stover's Revenge of the Sith Novelisation.

Latham2000 wrote:@LOTL

Bro let's not forget this unseen text from the RotS Novel:

"Palpatine summoned the dark power and transferred it to Dooku who felt his cells bursting in such an amplification he had never felt before. The power that swelled could not be contained forever and so the shadow let loose a small fraction of it through his vocal chords "ye!" he cried and Dooku used that power to grip Obi-Wan tossing him idly aside." -- ISV's copy of Matthew Stover's Revenge of the Sith Novelisation.

For those are doubting its canonicity, I recently coerced Chee into giving it Lucas Licensing approval on twitter, with the Legends banner, so it's 110% official