I don't think anyone can answer that question right now.
We have been hearing about the Nikon 8800 for many months and only within the past few days have a very few people in Europe been able to buy one. You can place orders for them now, but don't expect immediate delivery.
I checked two Nikon forums and there are no sample photos to be seen. There are no professional reviews of that camera, only pre-views. Again, no sample photos.
To be able to compare the Nikon 8800 to any other camera, you will have to wait until customers actually get their hands on the camera.
Im planning to buy an 8 megapixel camera. but i want to make sure that i pick the one with the best looking picture. thank you