The PAR readings listed above are plenty to grow any type of coral. Sanjay Joshi has frequently discussed that PAR readings at the bottom of an aquarium around 150-200 are sufficient for the majority of growth requirements.
The G2 provides approximately 20-25% more peak PAR than a G1 with TIR upgrade. The difference between the Pro and G2 is mostly with respect to the addition of the violet channels. There will not much as much of a difference in additional intensity as that between the G1 and G2. When you consider the price of a G2 is $650, it is a clear winner especially compared to competing units.