What are the key differences between SN1 reactions in protic and aprotic solvents?

In SN1 reactions, the key difference between protic and aprotic solvents lies in their ability to stabilize the carbocation intermediate. Protic solvents, such as water or alcohols, can solvate the carbocation through hydrogen bonding, leading to faster reaction rates. Aprotic solvents, like acetone or DMSO, do not have this stabilizing effect, resulting in slower reaction rates.