The technology website AnandTech has published a 12 page comparison of the new Konica Minolta DiMAGE Z3 and its predecessor the Z2, which might help you to decide which model to buy (found via digicamera.net).

“Overall, we found the Z2 to perform better than the Z3 in relation to Auto WB in tungsten light. In our color reproduction test, the Z3 had a much stronger yellowish-pink cast than the Z2. Indeed, it performed worse than we could have imagined. However, both cameras did pretty well reproducing colors in tungsten light when we used the Tungsten preset or set the WB manually. That said, we noticed that the Z3 slightly underexposed all of our indoor image tests (including video).”

Website: AnandTech - Konica Minolta DiMAGE Z2 & Z3: What is the difference in performance?