GJ was never said to have internal power equal to OYF. A person can still win in a battle if their internal energy are close to their opponent. GJ was able to at least tie with a GLFW with his wheels. That could suggest that he may possibly be better that time. And although it wasn't stated for sure thant GJ can defeat GLFW after 1000 stances, most us us believe that GJ will win by seeing the way he battle. While GJ might not be able to do that to OYF. It was never stated that GJ was equal to OYF in terms of internal energy that time, we just knew that they fought to a draw in a battle. If GJ's internal energy increases at the rate before, why would his IQ suddenly slow him down?
And can anyone answer me when in LOCH was YG borned? Because GJ was said to be 30 at the begining of ROCH, and YG was 13. Of course that would mean that YG was 12 in western style. And QQJ also said that he haven't seen him for ten years. So was he 30 or 33 at the start?