Diferencias entre ambas propiedades aplicadas a imágenes con canal alpha (png´s)
Neat! This inspired me to test out a theory relating to transparent borders: http://codepen.io/mlms13/pen/eHclj
This is the 3º pen about the diferents:
1º http://codepen.io/Kseso/pen/dFgqy is like yours
2º http://codepen.io/Kseso/pen/Ajamv aplied on a callout and arrow
Cool, nice to see it on the home page. :)
Need to know how to enable it? Go here.