Q: Is SPL the same as Strength? I couldn't find G in the Energy Parameters.

A: The Strength G (as defined in ISO 3382) is the same as the SPL if:
- One (and only one) omni-directional sound source is turned on, and
- the overall gain in the point source editor is set to 31 dB.
In this case the bottom line in the point source editor will display a value of 0 dB for the SPL on axis at 10 m. This is exactly the reference of the Strength, G. So, all calculated SPL results are actually also G values.
However, in all tables and graphs you will only find the symbol SPL, even when the conditions for G are fulfilled.