Personally, I think the Porsche is not as 'flashy' as the R8, and is a proven design. Don't know how much luggage space the R8 has. The Porsche has the rear 'seats' that can be used for extra luggage for that weekend away with ....... It's actually quite a practical tourer for two. Don't know if the same could be said of the R8
I remember when I was a kid, a friend of my fathers had a Ferrari Boxer. But when he went to golf, he had to take his Cortina because he couldn't get his golf clubs in the Fazz. Be a real b.....d to head off somewhere for a dirty weekend, but have to take your daily driver because you couldn't fit your luggage in your 'supercar'.