Looks like the s90 has some barrel distortion, but you expect that with a wider zoom lens. Otherwise, there's not much to differentiate them. But the picture wa

Looks like the s90 has some barrel distortion, but you expect that with a wider zoom lens. Otherwise, there's not much to differentiate them. But the picture was taken in good light. The E-P1 has a much much larger sensor, and should be much better than the s90 in bad light. Also, you can get a nice 10mm prime for the E-P1 (20mm full frame equivalent, compared to the s90's 28 mm FFE at its widest), or a fast portrait lens, or a telephoto. On the other hand, u4/3 lenses are often insanely overpriced (at the moment), and the s90 fits in your pocket.