Correa turned 28 on September 22 and will be will be playing in his age 28 season next year
He'll be getting an AAV of 26.92M per season until his age 40 season.
Turner turned 29 on June 30th and will be playing in his age 30 season next year.
He'll be getting an AAV of 27.27M per season until his age 40 season.
Turner relies more heavily on his speed than Correa (and will hopefully benefit more from larger bases), but Correa has struggled to stay on the field in recent years, since 2017 Turner has played in 749 games in the regular season, Correa has played in 636.
We're in basically the same boat as the Giants, they are simply paying for two earlier seasons than we are. I think if given the choice (and knowing its not my money) I would lean towards Correa at 350/13 over Turner 300/11. But its marginal.