You won't regret either.
The biggest difference is down to more torque and larger tires.
I've owned both. The base can be more inviting to drive flat out then the S. As the S will have you getting to speeds worth a ticket on any road in America with a 3rd gear pull.
The bigger brakes are nice and I would argue needed with the more potent S.
It's all down to that torque difference though, do you want to roll onto the throttle and be pushed forward or would you rather stab the throttle and drive the car more like a Subbie then a Porsche.
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