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Visible crew/equipment: When Picard, Data and Worf are on the planet, just a few shots after they leave the shuttle, Picard drives a sharp left curve. If you look at him in this shot, it is not Patrick Stewart sitting on the driver's seat, but his stuntman, who is not even wearing goggles. (00:12:45)
Answer: Shinzon was always intended to be much younger than Picard - the whole point is that he's a Romulan project that was ultimately abandoned - he hasn't gone through the accelerated aging process. Patrick Stewart could not have convincingly played a version of his character who was that young. And Tom Hardy does bear a distinct resemblance to a young Patrick Stewart if you look properly.
Tailkinker ★