Labels Twenty is very elegant and will work well with floral images and images requiring a more refined look. Layering these cut-outs with some of the more frilly design elements will look wonderful!
Labels Twenty-One is a very interesting shape and one that is very different from the other labels shapes currently available. I can see using this with some of the more masculine images and looks like it will work well in both orientations.
Enjoy your day and make a card to make someone smile!
Jeannette