It's true that the smaller size of point&shoot camera's sensor ( either CCD or CMOS ) provides a sharper/contrast than that of DSLR for the same common shooting aspects; nevertheless, it's hard for me to tell the difference when putting on the computer screen. Any way, anyone can readjust the sharp/contrastness on photoshop to the way you want. So, it's not that matter to me any way. What I'm more concerned is that it's hard for the point&shoot camera to shoot the selective background blurry ( for the low f-stop ). This technique is very necessary for shooting portrait type picture.
Any way, the contrast/sharpness does vary upon the shooting conditions as well. Depends upon the following categories :
1. The distance between the shooting object and camera.
2. lighting condition.
When shooting at the dimmer light, point&shoot camera seems to reveal its limitation. The camera with a smaller sensor when shooting at the low light condition gives the picture more noise - comparing to grain when shooting with film camera - than camera with the larger sensor for the same ISO. It's hard to say which camera is better, just how you shoot the picture, I guess.
I heard point-and-shoot gives you better/sharper picture than SLR, assuming all conditions are same, such as camera setting/skills.

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