I visited Big Bend National Park several months ago, and this was my only image recorded in 2 formats as a comparison. 98% of what I shot there was film: kodachrome, astia, ektar, and tmax 100. Occasional quick snaps were with my Canon a620.
I can't recall if I used a polarizer on the Astia image, but notice the differences between these images. Notice how much better/brighter the highlights are in the Astia slide film image compared to the a620 as well as the color tone. These were taken seconds apart. The initial scan of the Astia slide was rather dull, but there was the latitude within the recorded light to adjust the tone curve, etc. with Lightroom 2 to the finished version shown. And I also did what I could to fix up the a620 image using Lightroom 2 as well.