Those first two paragraphs seem to contradict one another. In the first, you say that 'when one puts on the mask , one IS Darth Vader'. Then in the second, you point out that Anakin is essentially Darth Vader or a 'different person' at those moments of ROTS that you mention, which is before he even puts on the suit and the mask*. So which one is it? *yet Padme still calls him Anakin, and more interestingly, so does Ben, despite what Yoda told him, during their fight on Mustafar. My point was to put Ben and Yoda's 'different personality' statements into context. And the ease at which they were able to 'pose' as their 'former selves' is probably due to the fact that they were STILL their 'former selves', albeit influenced now by the dark side. And yes, I do 'REALLY' think that it's the same Anakin in Eps II and III.