The fact is, post Anderson, Considine has almost always looked the "steadier" bet. Not as good as Zander at his best, but less often the bombscare Zander has been at times since the 08-09 season.
Zander.....a legend in his own lunchpants, can be brillian can be a twat! Considine will never be great, he will be steady though, and I think I know what I prefer in a defender.