White background photos are 12Mpixel images, nearly 10x more resolution than the "composited" images. All the white background images are " to scale" for the widest possible future use. If you need to "blow up" the image, there should be plenty of resolution to still give you excellent reproductions ( even if you have "cut and pasted" only a portion of the image).
The "composite" images are roughly 400x400 pixels. Suitable for web display, but may be limited for use in printed handouts. These images hilite the specific product, and as a result are not "to scale" with each other.
© Forever Young Professional Photography / Robert Young