Anyone know the difference between the Chip McCormick Match Grade Magazine vs. the Power Magazine?  

Thanks.  (MidwayUSA has a sale on the Power Mags right now.)

Power mags are the top of the line offered by them, they come with a 3 year warranty where as the Match grade do not.

Power mag:
The Most Powerful 8rd Magazine - 3 Year Warranty* - Simply put, the hightest quality, most reliable and durable 1911 magazine made. The POWER MAG* is an extra heavy duty magazine designed to significantly increase reliability and service life, even when kept fully loaded and seated in a pistol for extended periods. Stainless Steel construction. Die-controlled tolerances held to +/- .001 inches (over 75% tighter tolerances than Mil-Spec). Eleven (11) extra-powerful coils of aerospace grade Rocket Wire spring. More spring coils, more spring power, than any other 1911 8rd magazine. The huge increase in the spring power pushing upward on each cartridge as it feeds through the POWER MAG will improve the reliability of any 1911 type pistol. Service life is significantly increased as well. Constant usage or loaded and seated in a pistol for extended periods, the extra powerful spring offers maximum resistance against wear and fatique. The newly redesigned integral base pad/base plate is completely removable for convenient cleaning and maintenance. This new design has full length engagement, front to back, between the magazine tube retaining lips and the base pad/base plate grooves to ensure maximum strength and reliability. NEW! 3 new optional bases now available! Made in the USA...

Match Grade mag:
Advancements in design and feed lip geometry yield enhanced function. For 16 years, the standard for stock length, fixed base, extra capacity magazines has been CMC's MATCH GRADE mags. The best has just gotten better. An appreciable advancement in reliability and function has been achieved with our newly redesigned 2001 series of MATCH GRADE Mags. These new improvements can also offer reliability with a wider selection of ammunition. In addiion to new advancements in design and the resulting enhanced function, we have added convenienct quick referencing features by slightly increasing the size of the view holes and numbering the view holes so one can quickly determine at a glance just how many rounds are in the magazine. MATCH GRADE mags are made to the same exacting tolerances of our high end POWER MAG series. That measn die-controlled tolerances held to +/- .001 inches (over 75% tighter tolerances than the out dated Military Specifications used by our competitors). The spring used in MATCH GRADE mags are made from the same aerospace grade Rocket Wire as those used in our high end POWER MAG series. The fixed base plate on MATCH GRADE mags comes standard with two holes to facilitate the simple installation of the CMC's screw on base pads. You can order MATCH GRADE with or without base pads included. As with all CMC products, MATCH GRADE Mags are backed by a money back Satifaction Guarantee*. You can't go wrong with MATCH GRADE from CMC...Not available in Carbon Blue. Made in the USA...