Whats the difference between the vertical and horizontal SleeveCase?
Many people who carry the SleeveCase and laptop in another bag will match the orientation of the SleeveCase with the orientation of the bag it will be carried in. For example, the typical backpack is vertical, so backpack owners will buy a vertical SleeveCase. If the SleeveCase will be used in a horizontal case like the Cargo, then many people will buy a horizontal SleeveCase. Why? Because these people want to be able to pull the laptop out of the SleeveCase without having to pull the SleeveCase out first. However, these are just guidelines. You can, of course, order any orientation that would work for you.