Other than the price, what is the difference in these two? I must be missing something other than price?
http://www.aliexpress.com/store/product/50nodes-DC12V-WS2811-LED-technicolor-pixel-waterproof-full-color/701799_922175400.html
http://www.aliexpress.com/store/product/promotion-20pcs-string-DC12V-WS2811-LED-full-color-pixel-module-IP68-0-72W/701799_920999809.html
http://www.aliexpress.com/store/product/50nodes-DC12V-WS2811-LED-technicolor-pixel-waterproof-full-color/701799_922175400.html
http://www.aliexpress.com/store/product/promotion-20pcs-string-DC12V-WS2811-LED-full-color-pixel-module-IP68-0-72W/701799_920999809.html