ComparePSD features
ComparePSD is the first file comparison utility for Adobe Photoshop® files (.psd)
ComparePSD compares PSD files layer-by-layer
ComparePSD handles layers styles (effects), styles attributes and layers visibility flags
ComparePSD provides a scaled view of the files that helps you to find differences easier
ComparePSD allows you to select the files by right-clicking on them in Windows Explorer