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Maybe your dealer means something else. The GT3 engine has variocam and varioram but does not have variable valve lift. The 996TT does have variable valve lift, but, the GT3 does not.
The GT3 has Variocam and the Turbo has Variocam Plus.
Porsche explains both:
"The new 911 GT3 features VarioCam variable valve timing on the intake side based on engine speed and load. Exclusively developed and patented by Porsche, this highly effective technology uses a rotary vane adjuster on each intake camshaft to enable stepless adjustment of intake valve opening and closing. VarioCam differentiates between changing engine loads and seamlessly adapting valve timing to meet the actual performance requirements with the aid of the engine management system. As well as enhancing power and torque, the system offers smoother performance, improved fuel economy and fewer exhaust emissions across virtually all of the engine rev range."
"VarioCam Plus uses a combination of variable valve timing and variable valve lift on the intake side to improve power, torque and fuel consumption across the entire engine speed range. Essentially, the system offers two engines in one: the first for low-speed and urban use, and the second for maximum performance. Despite the enormous difference between these two configurations, VarioCam Plus is able to switch seamlessly between modes thanks to the latest in electronic engine management technology. The variable valve lift system consists of adjustable valve lifters actuated by an electro-hydraulic switching valve. The valve lifters in turn comprise two tappets arranged one inside the other, which can be locked together using a hydraulically actuated shaft. The inner tappet is in contact with a smaller cam lobe, the outer tappet with a larger cam lobe. With two different cam contours accommodated on the camshaft, it is possible for two different cams, and therefore two different valve lift curves, to be applied. Intake valve timing is advanced or retarded using a geared camshaft adjuster. This adjuster is also actuated by electro-hydraulic means."