460cc driver – the large head provides a bigger hitting surface. Weight is moved towards the perimeter. That translates to greater forgiveness on off-center hits.
The combination of large head, greater MOI, lower CG gets you going on every hole. Even if you mis-hit, you can get the ball going in the general direction.
Usually such well made drivers cost $100 or higher. The designers wanted to make a driver that is not as expensive but still has similar characteristics. They decided to make the clubhead out of aircraft grade forged aluminum instead of titanium.
You are probably asking “What does the player give up in comparison to a similarly sized titanium driver?”
The forgiveness is no different since the head is hollow and all of the weight is in the perimeter. Where the difference lies is in the face thickness and subsequently the ball velocity off of the face.