The skills aren't easily interchangeable.
Strategists focus more easily on what things mean and where they fit.
If you're a strategist, generating new ideas and making associations is your forte. Tacticians are detail meisters who cross the T's, dot the I's, and deal with the processes and the translation from grand plan to action. These detail meisters create the blueprint of how to accomplish tasks. If you're a tactician, putting words and concepts into action is your forte. According to many schools of learning psychology, each of us are predisposed to find one easier than the other.