Hello everybody,
this thread is getting interesting. In my opinion the question is not appropriate. It must be "Difference between a Blog and a Portal" OR "Difference between a Blog and a Static Website".
I hope everybody will agree with me in these points:
1. Every Blog is a Website (definition of a website - an e-location on World Wide Web, which can be reached from any internet connected device from anywhere in the world)
2. Every Website may not a Blog necessarily.
3. The word "Blog" came from "Web-Log", which means a platform where an individual or a group of individuals can enter and save articles and writes about their knowledge and acquired information (from some research) which is accessible by the world and helpful to them.
4. The contents of a Blog is always dynamic. It gets updated every now and then.
Please let me know with what are you comparing the "Blog", then I can explain you more on this. I hope it helps.