The raven's tail feathers stick out more. But tail feathers can sometimes be a bit of deceptive, since you don't always get a good look and some juveniles can have weirder-shaped tails than the clearly distinct ones shown in the charts.
Ravens generally look chunkier, because they're larger, have bigger bills and often a lot more feathers around their throat and legs, while crows in comparison look "slimmer". Ravens are also quieter and more solitary compared to the much chattier and social crows, and tend to fly without flapping their wings as much as crows.