I finally got a chance to see a couple of bits of the Terra E manga. I haven't read it all the way thorough yet but there are a couple of interesting things I noticed in comparison to the anime.
Like how the existence of the Mu seems to be common knowledge, whie in the anime if I recall correctly it was kept a secret until about half way through. Also, I love how Jomy's first meeting with Blue was bradcast on MuTV and watched by an entire classroom of children.
What if it had gone wrong and Jome was grewsomely killed? They'd have needlessly scarred a whole bunch of kids for life! And does that boy in the front look suspiciously familiar to anyone else?
Manga!Matsuka is not as pretty as anime!Matsuka. Also he's 17. I had thought he was about 19/20, I don't know why.
I know the ending is different as well, but I haven't read that part yet so I don't know much about it. I'll post some proper thoughts and opinions once I've read more.