Sorry! the two solutions do not provide different services, but Moodle is not for individual learning and eXelearning is not for classroom organization.
Moodle is an e-learning platform and as a server application facilitate the interaction between students and teachers. It could be seen also as a tool to facilitate the classroom organization.
eXelearning is a stand alone tool to produce/distribute e-learning objects. Can be also used as a tool for learning, asking to students to implement their own learning contents. It is not at all designed to 'organize the classroom' even if it could be also used in some way for this purpose.