I have both, the one piece Roadcrafter and a Darian Light jacket with the AD1 pants, 'cause you know, I'm a sick bastid and a gear junkie.
The Roadcrafter can't be beat for the commute. It's convenient, comfortable, carries more cargo than a small pick up and fairly weatherproof. That said, it's not great at extreme temps (mine is black, wouldn't do that again) and not as versatile as the Darien on multi day excursions. With the Darian, you have a jacket to wear whilst wandering around the rally or walking out to the restaurant in the rain after the days ride.
So for the daily grind, and if I only had one suit, it's the Roadcrafter one piece. For multi day trips I like the Darian. You can't go wrong with either, figure out what you will use your suit for primarily, it will work for everything and you will be an Aerostitch convert.
The Roadcrafter can't be beat for the commute. It's convenient, comfortable, carries more cargo than a small pick up and fairly weatherproof. That said, it's not great at extreme temps (mine is black, wouldn't do that again) and not as versatile as the Darien on multi day excursions. With the Darian, you have a jacket to wear whilst wandering around the rally or walking out to the restaurant in the rain after the days ride.
So for the daily grind, and if I only had one suit, it's the Roadcrafter one piece. For multi day trips I like the Darian. You can't go wrong with either, figure out what you will use your suit for primarily, it will work for everything and you will be an Aerostitch convert.