Water pump question (Wayne!)

[stateofidleness]

Wayne,
On the Pelican site, there's two water pumps, OEM and Pierburg.

Because of the cost difference, I'm just wondering if the Pierburg pump has the plastic fins like the OEM. I've heard it's best to stick to the plastic fins on the pump, so just curious as they're about $100 apart.

Thanks!

EDIT:

Also, what is the difference between these two:
Front Bumper Lower Trim, Right, Boxster/Boxster S (1997-04), Each ($10.75) (side question: why is the Left side $5 more than the right? just curious)
http://www.pelicanparts.com/cgi-bin/smart/more_info.cgi?pn=996-505-525-00-01C-M100&catalog_description=Front%20Bumper%20Lower%20Trim% 2C%20Left%2C%20Boxster%2FBoxster%20S%20%28%31%39%3 9%37%2D%30%34%29%2C%20Each%20%20%20

Rubber Lip for Fender Liner, Right Front, Boxster/Boxster S (1997-04) ($21.50)
http://www.pelicanparts.com/cgi-bin/smart/more_info.cgi?pn=996-504-504-00-M100&catalog_description=Rubber%20Lip%20for%20Fender%20 Liner%2C%20Right%20Front%2C%20Boxster%2FBoxster%20 S%20%28%31%39%39%37%2D%30%34%29%20%20