The TRS Focus 1.8 is still faster overall, but there are certain conditions in which the Cruze is quicker.

While the Focus 1.8 has had more development time, the Cruze has a newer (stiffer) chassis and a more powerful motor... so it should be faster.

But in back-to-back driving of the two, the Focus has the punchier down-low performance. The Cruze's long gearing and weedy mid-range torque are a handicap on the racetrack.

Personally, though... if you could tweak out the understeer inherent in the Civic 1.8's rear suspension, it should be faster than either of them.