The proliferation of internet technologies and the World Wide Web (WWW) has brought about a substantial surge in the past decade, promising the potential for learning at any time and from any location. This newfound accessibility has proven to be a significant advantage for learners worldwide, granting them the ability to engage with online environments and thereby facilitating improved access to a plethora of learning resources available in open repositories. As contemporary communication technologies continue to evolve, the concept of e-learning has emerged as an omnipresent and influential force, bestowing a newfound flexibility upon the learning experience. However, amidst these advancements, a notable limitation persists in the form of the widespread adoption of a one-size-fits-all approach within many e-learning systems. These systems often prioritize harnessing the capabilities of Information and Communication Technologies (ICT) to deliver learning content in standardized, uniform formats. Our research endeavors have been dedicated to addressing the inherent challenges related to the presentation style and categorization of learning content within online environments. This pursuit seeks to comprehensively assess the effectiveness of these approaches in meeting the diverse range of learning needs. This investigative journey has culminated in the development of dynamic policies and models that facilitate the personalized recommendation of suitable learning content, transcending the constraints of traditional methodologies. At its core, our research aspires to harmonize learner requirements with the inherent capabilities and styles of learning objects, ultimately leading to the identification of optimal Learning Objects (LOs) for every phase of the learning cycle. General Terms - Comparative Study, Online E-learning Systems, Semantic Web Technology, Intelligent Mobile Agent. Keywords - Intelligent Agent, e-learning, Semantic Web technology, Ontology, Online e-learning Models, Learning Management Systems.