EurekAlert outlined the technicalities that make the engineered yeast unique, stating:
In other terms, the engineered yeast can boost ethanol production and, at the same time, make the fuel both easier and cheaper to produce. That's something worth gushing about.This approach ... eliminates the costly step of adding a cellobiose-degrading enzyme to the lignocellulose mixture before the yeast consumes it. It has the added advantage of circumventing the yeast's own preference for glucose. Because the glucose can now "sneak" into the yeast in the form of cellobiose, the glucose transporters can focus on drawing xylose into the cell instead.
[Source: Fast Company]