Exactly! The magnitude of both vectors is 20, whereas the directions are different because the angles they are making with the positive x-axis are different.
Imagine two cars: a Mercedes and a Rolls-Royce. Both of them are travelling at 100 km/h. But, the Merc is going towards the East, and the Rolls-Royce is going towards the West.
If the car's motion can be thought of as a vector, what is true about the Mercedes vector and the Rolls-Royce vector?