I am now 95% on digione signature, so use digital coaxial cable and not USB.What are you using currently?
I have used upto 4 meters between PC and DAC without drop outs.
I still have that cable. It is a green colour Forest cable from Audioquest.
Shorter is though advisable unless you are constrained to go with longer cables.
Have used the longer one with laptop n the shorter with the USBridge. Never compared simultaneously. Will do sometime next week and update.Any particular reason shorter cable is advisable , since you have both the cables did you notice any difference whilst using both ?