Paul wasn't as obvious with his put downs on Ram as John was with How Do You Sleep? That song is so obviously about Paul it really couldnt be about anyone else, I dont care what excuses John makes, it's blatantly about Paul whereas things like Too Many People and Dear Boy are a bit more subtle.
I totally see what you mean about the difference between Beatle Paul and Solo Paul. I always view solo Paul as "Macca" and Beatle Paul as "Paul" or "Beatle Paul". The thing is, when he was in the Beatles, he always had John to put him down and tell him things were rubbish or whatever. After the Beatles he could do anything he liked and this is why his music was sometimes temperemental (although I still like it!!!). But this is generally what a lot of people say about Paul, he had "too many people" telling him how great he was.



