I see Matip as more the Agger type than Hips, stepping out with the ball from the back and even looking to break beyond the midfield line at times.
Who the more important of the 2 were is very hard to call. Matip was there in all the big games, Barca 4-0 he was there, Bayern 3-1 away he was there, Spurs in the final he was there.