Sorry for the late reply.
Each have their advantages/disadvantages as others have stated. The placement and design of the stock non-intercooled Supercharger produces loads of heat, which after hard driving will produce less horsepower and have a greater potential for detonation. The boost cannot be electronically controlled with the supercharger, which require replacing the pulley. Superchargers tend to lose power at high RPM. The advantage of a supercharger is it produces more power in the lower rpm's. Our setup produces about ~25RWHP less under 3,000RPM, but makes more power and torque everywhere else, even compared to the fully modified Evora S.
We've PM'd Bibs, and are looking into becoming a sponsor. The exhaust is fully customizable, we can add an extra high flow catalytic converter or muffler, as well as have the wastegate dump recirculated into the exhaust. The car has catalytic converters in the stock manifolds which allow it to pass emissions here, even with a straight pipe from the turbo. We have about 500 miles on the turbo setup and everything is functioning great. We've taken Two NA Evora owners for test rides and the reaction has been positive, 100% different animal with 400RWHP. The chassis is amazing with the added power, it makes up for where the car lacks. No more passing high horsepower cars in the corners to be passed back on the straights. The Evora S is in the states. We've been talking with an Evora S owner that is interested in Twin charging, to get the advantages of both the supercharger and turbocharger.