Canon PowerShot SD630 vs Nikon CoolPix P3 digital cameras reviews
Canon PowerShot SD630 has larger screen (3") than Nikon CoolPix P3 (2.5").
More details at picture has Nikon CoolPix P3 since it has 8.1Mpix at picture. Canon PowerShot SD630 has less details and worse picture quality (6Mpix).
Optical zoom at Nikon CoolPix P3 is 3.5x. Optical zoom at Canon PowerShot SD630 is 3x (which is lower).