Sturridge is arguably the most talented forward at the club, not sure he's the best footballer though, especially from the tactical side of things. Even if Sturridge was 100% fit there would be a strong argument for starting Origi ahead of him, I think Origi holds the ball up better for a start.
Sturridge is capable of moments of magic, the Seville goal for a start, but you sometimes have to put up with carrying him in between. Origi will always work hard and give his all and he's extremely talented in his own right. He's still a kid, he could become a very special player.