Difficult I question I guess to answer, as unlikely that any of us will have done both routes. When I came to decide it was due to a similiar set of circumstances to yourself.
The other biggie was that it was a single week consolidation with the 3 modules rather than two lots of two weeks. Made it easier to fit in around work. Yes, you have an extra few days to take off for the exams but overall if you get through first time like I did then you do save a few days holidays!
That way you get to spend more holiday time actually in the air rather than sat at the books
kui