The 300 will work fine and as said be some what heavier, however as also said it will have lower quality bearing/seals and so not be as robust or have as long a life. As you are still riding Octalink you may be one of us who keeps old bike moving and would be better off with a BB that will have a longer life. Some day soon Octalinks will be very hard to find ($), the first version is getting that way now, fortunately you are looking for V2.