It's hard to imagine that anyone who was satisfied by DS9's overall story arc could feel satisfied by Babylon 5. For example, if DS9's treatment of the Prophets seemed fitting, then Babylon 5's treatment of the Vorlons must seem outrageous. Or, if the human role in galactic affairs seems appropriate to human stature in DS9, then Babylon 5 must seem like some kind of self-flagellation. If Section 31 on DS9 seemed so cool, then Nightwatch on Babylon 5 must be some sort of maniacal leftwing caricature. If Sisko's apoetheosis in the cave of Mt. Doom seems like a satisfying climax, then Severed Dreams must be a nightmare.
No need to imagine it. I was satisfied by both and can accept both for what they are, without taking anything away from the other.