Are there any advantages over the base Scorpius, such as armor, shields, and maneuverability? Will the Antares have improved speed to chase down targets over the base Scorpius?

The Antares' armor and shields are the same as the base Scorpius. However, the lack of a turret makes it lighter, so the Antares has a marginally higher top speed. For balance, its handling performance has been slightly reduced too.