Well it weighs half as much, and you get rid of the old clamp style lid. As far as how it actually functions it shouldn't be much different as long as the stock one you're using is in good repair. I like the newer style better than the original. Not a fan of how the plastic reservoir looks, but oh well.
The only issue I've had with the new ones are the caps and gaskets they come with. They seem to seal for a little bit and then stop. But new caps and gaskets are easy to come by and even the Dorman versions work well. Just not the OE ones for some reason. Couple bucks to fix, the replacement ones have never caused me any issues.