Stickers are more graphical in its design (Such as logos, illustrations, and pictures you want to use ) and are typically applied on a smooth surface of any size.
Stickers are like simplified business cards, but with an adhesive on the back and more graphical than informational (Such as logos, illustrations, and pictures you want to use ).
Stickers are also more temporary than permanent and are more of a decorative element. Labels are similar, but tend to have more information than graphics and are not quite as temporary since they are "labeling" an object or surface.
Both are normally on the small side and can be printed in large or small quantities.They also are both temporary adhesive objects that are produced with inks that are not weather proofed are designed for the outdoor elements.