The two series are entirely different beasts. B5 took television into new, interesting and compelling areas. It started with a planned story and (mostly) stuck to it right to the planned ending. Stargate was more like a "we bought the rights-now what are we going to do with it?" series that turned out rather well overall. Stargate is more like Eureka-light and fluffy with bits of darkness mixed in. Its...fun. B5 is brooding, menacing and filled with foreshadowing. Nothing ever seems to come out neatly-and if you watch it as it aired, you find yourself going "Oh, God, what happens next?" The two shows are different experiences. Watch them both- they have different rewards, but both ARE rewarding in their own ways.