Maybe I didn't say it right if that is your conclusion...
"The intake valve on the closing ramp, against the actual measurements of mechanical compression, are the two major principles..Correct?"
They are two major "principles" yes. But it's not one against the other in some ratio if that is what you mean.
A compression ratio is the difference between measurements of given volumes of a sealed cylinder. If the volume of the sealed cylinder with the piston at BDC is "x", and the volume of that same sealed cylinder with the piston at TDC is "y", the ratio is x divided by y. Static compression ratio is just that. The Dynamic ratio takes into account where the piston is in it's travel up the bore in relation to when the intake valve closes and at what point that same cylinder is actually sealed. Ratios can be calculated and do not change. Call it a variable that is designed in and effects the reading.
A compression reading is the measured output of that design. It is dependent on those physical mechanical relationships, but it is also dependent on the physics of a running engine - or cranking engine as it really would be. Things that cannot be duplicated or predicted with 100% accuracy. As an output that is partially based on the physics, the speed with which it's being turned will change the result.