Both considered commuter hubs for DC. And I think they're alluding to being able to utilize the DC metro 'inside the beltway' (I-495) hence the distinction there, which is true to an extent, but I wouldn't live in NOVA or MD without a car personally. There is Amtrak service to areas outside of the beltway, but my experience with Amtrak has been extremely poor. I know many people in DC and they all own a car because the metro, while great for getting in and out of DC, is somewhat limited when it comes to going anywhere else.
Both considered commuter hubs for DC. And I think they're alluding to being able to utilize the DC metro 'inside the beltway' (I-495) hence the distinction there, which is true to an extent, but I wouldn't live in NOVA or MD without a car personally. There is Amtrak service to areas outside of the beltway, but my experience with Amtrak has been extremely poor. I know many people in DC and they all own a car because the metro, while great for getting in and out of DC, is somewhat limited when it comes to going anywhere else.