The main and obvoius difference is being able to use the lens of choice in any given situation. That is of course if you own the lens of choice. For example I wish to get closer to my subjects so I would like a quality lens dedicated to that end, however my lens of choice is almost $850, almost twice what you want to spend on a camera. I just want to drive home an important point, and that is just because you have a fancy DSLR you won't necessarily be able to take the spectacular shots you see here without some expensive additional equipment. Not to mention a tad of knowledge on combining the systems to get the shot you want. The Finepix, while limited to the lens permantlyattached to the body, the S9000 has a particularly good lens, will take excellent shots, including macros that will dazzle you, right out of the box, even with limited photographic knowledge.