FWIW, here are two pictures of the same page:
- http://i.imgur.com/CThwDev.png (Quill)
- http://i.imgur.com/FXiVmBd.png (Aloha)
In addition to injecting superfluous markup, Quill also changes the font.
Incidentally, the LICENSE file does not explicitly state that it is BSD-based. I admit that I did not read (very far) below the fold on either the Quill homepage or its Github page, but went directly to the LICENSE file. (Again, mostly because I don't want to waste a lot of time hunting for the same information across 30+ projects.)
https://github.com/quilljs/quill/blob/develop/LICENSE
As far as I have discovered, no other such comprehensive comparison exists. I trust readers will verify the information for themselves and hope that it may prove useful.