Everything in Gundam 79 can be inferred through context and eventually gets explained very clearly, and even then the more vague elements are not critical to understanding what's happening.

Zeta on the other hand is a gigantic mess. For at least 20 episodes, it's totally unclear who the Titans or the AEUG are, nor are most of the main cast introduced with clear explanations of their roles. Henken and Blex just appear and start giving orders without giving the viewer any idea who is in command or what specifically they're trying to accomplish.