Smith is the best shooter of the three. Stiemsma is more of an effort player and Withey needs to prove his game translates to the NBA.
Davis may also get significant minutes at center.
Both Gasol and Hill can and will play center throughout a normal rotation -- Gasol may still end up the opening-night starter. The Lakers also brought back the energetic Robert Sacre.
The Lakers have a slight edge at center with Kaman, more so if Gasol is the starter.
Who is better?
The Lakers will finish ahead of the Pelicans this season.
If Bryant, Gasol and Nash can't stay healthy, the answer isn't nearly as clear, but with both teams at 60-100% capacity, the Lakers have the better roster.
The Pelicans have the advantage athletically with Holiday, Evans, Gordon and Davis. Along with Anderson's shooting, that's the core five and a dangerous group.
The Lakers are more experienced and have greater depth at nearly every position.
Last season, New Orleans finished 14th in the West with a 27-55 record. The Lakers ended 45-37, despite massive injuries all season.
The Pelicans will be better than they were a year ago.
The Lakers may stand at about 45 wins, and while it's unclear if they'll make the playoffs -- after looking at the Pelicans, the Lakers won't finish 15th in the conference.