The Fujifilm site gives a detailed description of their CCD (Charge Coupled Device) pixel array that to me sounds like the best thing going in what the working class like me can afford. The S602 is Fuji's 3rd generation CCD, the S5000 is their 4th generation. The 602 has 6x optical and 4.4x digital zoom (26.4x), the 5000 had 10x optical and 2.2x digital (22x). If that extra 4.4 turns your head, then shopping for a telephoto is probably something to consider. I find the greater lens power more attractive, and sould give clearer photos, at 22x side by side with the 602 at a comparable setting.
If you want to spend serious $$$ for something that has 5 to 8 megapixels, more power to you. But the S5000 is a better Fuji for less money ... the S602 is really last year's news. My hard earned greenbacks are on the S5000.