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.
NEW Wenger Swissgear 17.1 inch Laptop Backpack/Notebook Bag/Rucksack Backpack | eBay
Wenger MoveUp 16 inch Laptop Backpack - Charcoal Heather
NEW Wenger Swissgear 17.1 inch Laptop Backpack/Notebook Bag/Rucksack Backpack | eBay