Should I get a tutor or take a cl for SATs?

As i'm getting ready to start preparing for my SATs as a sopre, I have the choice of either taking a month long SAT cl in the summer or getting a private tutor for the weekends. Which one would be more beneficial to raise my scores? I took the PSATs this past fall and collegeboard said my estimated SAT score would be around a 1900 based on my results. my goal is to get 2100+. please help and give advice, especially if you've had personal experience! thank you!