The side intakes suggest that this could be the high-performance Turbo Cabrio model.
Clear differences between the 998 and the current 911 model are a pair of more upright headlights, and the side mirrors are now positioned at the side of the doors and not at the window. The body also appears to be slightly longer, suggesting a longer wheelbase and more interior space.
It’s still too early to determine what changes Porsche has in store for the engine lineup, but expect to see the recently revised flat-six engine range carry over with only minimal updates – possibly for emissions and economy standards. The new PDK dual-clutch gearbox will also carry over as will a standard six-speed manual.
Source: Motor Authority