I have been visiting both for a while now and they both compliment each other pretty well. There are many members that count themselves as members of both forums since there are benefits to both. The Oakley Forum is far larger and gets a lot more of the general discussion. Generally speaking it is a place for junior to intermediate level collectors. The O Review is far smaller, has the database and is made up of much more senior collectors. It is where you go if you are already an expert and want to learn even more. I know members from both and they both have great communities.