Odd comparison I know, but its not in terms of career accomplishments, as it'd be really hard for anyone to put Lidstrom above most likely the best tennis player ever, even though I think hockey is the harder sport to reach the absolute top. One is recently retired and the other is closing in on the end of his career.
What I'm wondering is, who do you think is the better ambassador of their sport and the classiest guy. Really tough decision for me, I'm leaning Lidstrom, but its close.