As you know, I've got experience with both Cobb pieces. They are of the highest quality. The intake has an air straightener also. The only downfalls are price and I know at least a couple of users have not installed these pieces correctly and had the silicone tubing sitting on hot metal. This caused a burned/melted spot on the TIP.
I don't have any first-hand experience with the PG items. I know Ken gives a good bit of flexibility with the filter and some powdercoating options. I don't know if they have an air straightener or not. Price is definitely more attractive here.
You should ask yourself if you're interested in getting the Cobb AP. Furthermore, you should ask yourself if once you get an AP if you'll be sticking to the off-the-shelf maps or if you'll get a custom tune down the road. While intakes may be similarly shaped/designed, the flow characteristics can be dramatically different. There are many off-the-shelf maps for the Cobb items. You can run those same maps with the PG items I'm sure, but it wouldn't be optimal.