I am quite happy to have made this upgrade. I believe the difference is with one you are buying the adapter kit only and the other comes with the socket. I have the socket and you are welcome to borrow it.
I have the adapter on my car and I love it. For one, it uses newer technology filters that do a better job of filtering. That said, it probably won't make a bit of difference over the life of the car unless you drive in really dusty conditions. It is quicker and easier to change a spin on filter and you don't have to worry about the inner seals. I use K&N or Mobil1 205 filters. They are exactly the same filter my BMW E30 and VW Cabrio use so I have only one size on the shelf. (Not counting the Nissan) You can get them everywhere. On frequent sale at Advance Auto Parts you can get 5 quarts of synthetic oil WITH an oil filter for $34.
For the installation on our cars, the center thread tube is a bit long. You'll want to cut about 30mm off and file the end of the thread. Other than that, installation is a breeze. You can use the full length of the center thread, but then you have to use the 208 style filter that doesn't have the center pressure relief bypass valve. That's not a problem if you keep your oil clean. It just means that you spend an extra minute or so spinning the filter on and on and on... and then off, and off, and off. It also means that at the far end of the thread, the filter is hitting the motor mount.
