Remember, when dealing with ringing, we are dealing with a resonance problem, just without the necessary energy
to sustain the oscillation at said frequency. As such, the effects will be both below and above the resonant frequency.
We see the same problem occurring in speakers, only the Q is much less, so a hump or dip in the FR.
Back in the late 80s/early 90s, I experimented with altering the preamp response from -1db at 200khz to -1db at
150k. The difference was easily perceivable with music playing. The problem will be audio system dependent. So some may or may not perceive the "attack" difference. I believe it was Van Alstine who once claimed he designed for over a mhz to minimize the problem, or something to that effect.
Again, remember that one is killing what most call dynamics every time we add a stage and reduce the rise time/attack.
Yes, I have found usb cables and probably other cables affect the sonics. Different circuitry involved with different
types of coupling as well.
Also, important, remember that dacs have at least one analog section by definition, and almost always 2, an analog
gainstage. As such, different dacs can and will sound different.
cheers
steve