The biggest difference is that the Ranger only has advantage during his first turn in combat, and the Rogue has advantage against any creature that hasn't taken a turn in combat.

My ruling and understanding of the distinction between "taken a turn" and "acted" is that the represent the same thing.

The biggest difference is that the Ranger only has advantage during his first turn in combat, and the Rogue has advantage against any creature that hasn't taken a turn in combat.

My ruling and understanding of the distinction between "taken a turn" and "acted" is that they represent the same thing.