The Columbia jacket is waterproof. The ZeroXposur (WTF?) is not. It will wet through in a rain storm. Kind of defeats the purpose.
When looking at waterproof jackets, you should be paying attention to two things - waterproof rating and breathability. Waterproof ratings come in different favors, but are generally a number between 5-30,000. The number represents the height of a column of water, in millimeters, that the fabric will support before the water leaks through. Higher is better. It looks like this:
A waterproof jacket will feel like a rubber glove unless it breathes. Breathability is measured in g/m2/24 hours. That's grams of water vapor moving through each square meter of material per 24 hours. Numbers again range from about 5-30,000. Higher is better. It looks something like this:
Columbia's jackets are rated 10k/10k. The other jacket is somewhere south of 5k, if it can be rated at all. I wouldn't trust it to keep you dry.
On a certain level, you get what you pay for when it comes to waterproof jackets. However, once you get to a certain level, you're paying for bells, whistles, and extras that are nice, but unnecessary. Me? I like Arc'teryx and Patagonia. Columbia owns Mountain Hardwear, which is also top notch. Go with what fits best.
[RIGHT][size=100]- Sapphire Preferred - Freedom - Ink - Platinum - Everyday Preferred -[/size]