Are our Slants "Unsafe"?

That said, if you take a look at pp. 13-14, there's an interesting comparison of the Ford Crown Victoria and Mercury Grand Marquis. These two cars are identical except for minor trim and decorative elements. Virtually all police cars are Crown Vics, and virtually all Grand Marquis buyers are grandmas and grandpas. Police duty serves as a workable proxy for the kinds of risky driving attributable to testosterone poisoning; look at its effect—it pushes the Crown Vic way up the Y axis! So, perhaps thoughtless behaviour behind the wheel does influence the real safety performance of trucks.

You begin to see how complex this all is…?
I use to work on cop cars.And you are correct on the similarities but they are different, driveshaft is aluminum ,computer are different,cop cars come only with steel rims,suspension and sway bars are HD.
Most cop cars have cages in them,which would seem to be safer in side collisions.Rear end on Crown Vic Police cars are strapped with rubber covering the shackles due to gas tank explosions from being rear ended.
I rather be in a cop car than a gran marquis....
Which did they say was safer the gran marquis due to the older generation of careful drivers as opposed to the rookie cop with a chip on his shoulder?