For normal street driving, the only time a limited slip would be of a significant benefit would be in low traction situations like snow. Witness BMW used to sell a limited slip as a Winter Diving Package before the advent of traction control.
For Malta, I don't think that is an issue. For your location, if you don't track your car, it would probably be a complete waste of money.
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Kippis
986S
991S
Van Diemen RF97
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