Corinthos was not inerted which could easily have made the difference.
Twin screw would have given pilot more manueverabilty,
even though Queeny had a bow thruster.
Problem with single screw is that you have to have way on
to have substantial turning moment.
Since the Corinthos had been discharging for some time,
looks like most spill volume estimates are high.
Hooke says "nearly completion of discharge of her 52,973 tons
of Algerian crude oil".
We need more info on depth of penetration,
to say whether double sides would have helped.
Very few collision in which one ship's bow is the penetrator
result in less than 2 meters penetration.
But this might have been one.
The USCG indicates the Queeny speed on impact was very low,
angle 39 degrees,
and somewhat inconsistently Queeny anchor was an important factor
in the amount of penetration.
Hooke says Queeny had damage to bow, forecastle,
and port side shell in way of No 4 port tank.
USCG calls the Queeny steel damage minor.
About 3 minutes prior to impact,
Queeny Master over-ruled Pilot and went astern.
But it took a minute to switch the engine over.
During that period, the turn rate slowed from 19 degrees per minute
to 12 degrees per minute,
which may have made the difference.
After the engine was actually going astern,
it would have kicked the stern to port
assisting the starboard turn, but generating stern swing.
Therre is some evidence that the rudder was left hard starboard
went they went astern.
If this mistake actually was made,
Once the flow over the rudder was reversed,
a starboard rudder would have pushed the stern to starboard.
then it to could have made the difference.
USCG seems not to have made much of this.