Rear Camera Quality of image seemed sharper on Series 2 IS250, also IS300h camera prone to water droplets fogging lens. Series 2 never suffered with this and lens was always clear. Water Traps More gaps on IS300h than Series 2, makes leathering a pain! Wheel Spray IS300h kicks up more spray off the road, Series 2 wheels were tucked under the arches more and hardly suffered with road spray. Boot Lid IS300h feels lighter and thinner metal. Voice Command Temperature control removed from IS300h. This was the only voice command I found useful in the Series 2. Rear Wheel Arch Liners Series 2 had soft fabric inner liners that softened the road noise when wet. Pop Up Bonnet Remove this feature or a way of switching it off. Too costly to repare.