Iginla. Bigger, more physical, tougher and more intimidating, better goal scorer, more longevity, and won an Art Ross with Craig Conroy and Dean McAmmond as his line mates.
The only thing St. Louis really has over Iginla is team success, which is a dumb argument in these type of comparisons 95% of the time, and this is no exception.
St. Louis has an additional Art Ross (in a half season), but Iggy has an additional Rocket (shared), so I’d call it even on that front.
I don’t see how you could pick St. Louis without being a homer.