On Wesdnesday, I'm picking up the Lumix 20mm pancake lens. Pretty excited. Which bodes the question: should I now sell my Panasonic 14mm? I know it's wider and focuses more quickly, but is it redundant to have two very similar pancake lenses? Is there a scenario in which I would want to keep it or should I try to recover some of the $190 I spent on it via eBay?