>>5
Esperanto is based on European languages.
"The vocabulary, for example, is about two-thirds Romance and one-third Germanic; the syntax is Romance; and the phonology and semantics are Slavic."
http://en.wikipedia.org/wiki/Criticism_of_Esperanto
After all, it was created by an oculist in the 19th century, that's before the development of modern linguistics, logic, and computer programming.
Lojban's root words (representing concepts most basic to the language) are constructed from the lexicons of 6 major languages: Chinese, Hindi, English, Spanish, Arabic, and Russian. A certain computer algorithm synthesized them so that their recognizability for speakers of other languages are maximized. And, unlike Esperanto, the morphology has no default gender bias/impartiality:
"boy"
nanla (Lojban)
knab-o (Esperanto)
"girl"
nixli (Lojban)
knab-in-o (Esperanto)
(Notice also that "nanla" contains the sound of the Chinese "男孩" [nán hái], and "nixli" the sound of "女孩" [nǚ hái].)
You can ask questions on IRC too (there are usually 50-80 people in, which is about twice the number of Esperanto's 20-40):
http://www.lojban.org/irc/