I'm not sure I understand. Aren't most emoji included in Unicode? I mean, they're sort of black and white and poor, but they're there. What does this add other than a new library of graphics that needs to be supported and may or may not be better than the ones we see on iPhone or Android?
I guess some are missing from the Unicode set. But I'm not sure I like the art style on this one, so I wouldn't choose it either.
The "native" column shows what your device will show by default just using the unicode characters, and in chrome on windows (fairly high demographic) they almost entirely display as black boxes. Every device is going to interpret them differently.
We're aiming to provide a full color set that closely follows the unicode standards, translates well to Twitter, Apple, Microsoft etc's proprietary sets and is freely available and modifiable to anyone who wants to implement them into their web or mobile app.
I guess some are missing from the Unicode set. But I'm not sure I like the art style on this one, so I wouldn't choose it either.