I don't know that one is better than the other. The Givi crash bars look good, but I hear the Suzuki version is weak. I went with sliders. They were relatively inexpensive on eBay and supposedly work great. Look OK, too. Hope I don't ever find out.
Go to the
Protector category here >>>
http://www.whaccessories.com/Suzuki%20Bandit.htm to check some out.