Despite what you may have been told, the RAF and BA do not look for the same qualities in their potential recruits, although they use similar methods to assess them.
It's not too difficult to understand why; the qualities required of a Harrier pilot, operating on his own in a very fast-moving, high-risk environment do not necessarily square with the safety-first environment of the airline pilot. That's not to say that the same person couldn't do both jobs (many airline pilots are ex-fast jet), but there are elements of the ideal candidate for each job which might exclude them from the other. This can obviously change with maturity!
I would no more trust the RAF's judgement on your fitness to be an airline pilot (no, military transport pilots are not doing the same job) than I would BA's judgement on your fitnes to fly a Tornado.