Yeah from what I've learned over the last few days, gravitational and intertial mass are experimentally identical. There was emphasis on the word "expeirmentally", like they were trying to emphasise they are not considered as identical.

You say "may" derive after 30+ decimal places. I assume that 30+ decimal places is therefore as accurate as we can measure these things? Are you saying that gravitational and inertial mass may be the same thing? Or are you saying they may just measure the same?