My online retailer of Victorinox and Wenger is awesome! I asked him for the difference between their Ibex, Synergy, and Pegasus backpacks, and he sent me this photo and called to explain.
Wenger Backpack Ibex order online- Swissmade Direct
Introducing Wenger
Wenger IBEX Carrying Case (Backpack) for 17" Notebook - Black, Blue | OfficeSupply.com