What are the differences between the manga and anime versions of Excel Saga?
I've only read a bit of the manga, but as far as I can tell, the manga was more of a focused satire on the state of Japan's economy and politics in the '90s and early 2000s (a bit more like the later, similar series Nerima Daikon Brothers). It didn't have as much genre parody as the anime did. It also had the character of Elgala, a third ACROSS agent who works alongside Excel and Hyatt.