Register a free account to unlock additional features at BleepingComputer.com
Welcome to BleepingComputer, a free community where people like yourself come together to discuss and learn how to use their computers. Using the site is easy and fun. As a guest, you can browse and view the various discussions in the forums, but can not create a new topic or reply to an existing one unless you are logged in. Other benefits of registering an account are subscribing to topics and forums, creating a blog, and having no ads shown anywhere on the site.
The smaller the number (4 versus 5) means that it works faster (not much though). The numbers refer to a wait state or latency of the memory, so a lower number is generally better. There are other factors also, but looking at those 2 types, I would say Platinum is "better" than gold.
I would agree also that the platinum series is better. Lower latency is always something to be desired but they are so close that unless you were using software to test your pc then you will not notice the difference. In this case, I would stick to whatever gives you the biggest bang for your buck financially.