Cuts, yes if the radiology program you are applying to is an "advanced" position program (starts at the PGY-2 level), then you must apply to both the PGY-1 internship year and the advanced PGY-2 radiology program at the same time. This was quite a pain for me as I went on close to 30 interviews combined (prelim and radiology).
I think the orginal question has been answered. The combined prelim/transitional and radiology (5 yr) programs are actually a bit easier to match into than some of the find your own prelim/transitional and match to our advanced PGY-2 radiology residency programs. So even though there are fewer of them, the perceived quality of the ones I interviewed at where was not as high as some of the advanced programs I saw on the interview trail. I think the combined/categorical (non-advanced) programs fell somwhere in the middle of my rank list (not top or bottom). All the programs at the top (and bottom) of my rank list were advanced positions. Having said all this, I believe it depends on the quality of PGY-2 advanced rads programs that one gets interviews with. I also have two or three transitional programs that I would love to match into next year, so that brought down some of the programs on my list. But that was only one of a multitude of factors that I used to determine my rank list. Radiology is competitive. Your should not worry about matching one or the other but matching somewhere given the competitive nature of radiology. I don't think it really matters unless one is set on doing a transitional year in City X or programs X,Y, or Z.