Two headlines, same story?

Take a look at the different takes the Detroit papers had on the day-after Christmas holiday sales. The Free Press headline takes an optimistic approach, saying "Big discounts lure shoppers to malls." The Detroit News tells a different story, with a headline that says "After sluggish holiday, Wednesday is another letdown." It's the same coverage area, same malls, same shoppers. Can they both be right? Can headline writers or news editors slant the news with their own interpretations? A close read of both stories shows they had similar facts. But reading the headlines side-by-side this morning left me - a reader - puzzled.