All of the above are absolutely correct! It would be a huge waste of money, unless they were given to you for free. Even then, why would you make the change? I've known people who've run both, and I agree with UNGN that the "Ford Bluetops" are actually the better of the two, if you can even tell the difference. Either way, it's a moot point, in that you really should not do anything until you're ready to move up to the appropriate next step, which would probably be the 50's. Changing from the 36's you have to even a 009 42.5 would be such a small step that it would hardly warrant doing it, IMO. However, this all depends on your end goals.