This takes place far in the future. The emperor of the star empire has a lot of things to deal with, that stress him out. The treaty with Xcarus is down the toilet, the High General has just purged a great number of high ranking officers for suspected treason, and his brother tried to assassinate him, and has just ran off to planet Telstar.
He enjoys the occasional drink now and then. His favorite drink is some Terran delicacy called - what was it? Whiskey. And other hard liquors. He often buys the stuff straight from Terra, or Amon if he wants something more exotic. But, all the liquors he buys from Earth and Amon are nano-replicated, as nobody cooks on Earth. He could easily just download the prints, and replicate his own.
The shipments of whiskey the alien emperor buys are important to the plot. So, why would the emperor import when he could simply produce his own?
Both prints would be of equal quality, and quantity.
Space shipping long-range is very expensive.