Re: CD vs Vinyl
There is a difference between what you describe as dynamics, I guess, and dynamic range. Dynamic range would be the difference between the lowest sound level possible and the highest sound level possible. Listening to a passage on the two technologies can not measure this. Real world listening tests are going to lead to a subjective, not measured, conclusion.
Many CDs are compressed for recording due to the great number of user and broadcast equipment that really can't handle much more than what a LP can produce. To really know what is going on with your tests, one would need to know how the source was recorded. It may not contain the dynamic range.