You need only look to Hornaday itself, the Critical Duty round was developed because their other rounds failed FBI criteria and many departments would not allow their use.
I checked the Hornady website about the Critical Defense and did not find any reference about their other rounds failing the FBI criteria.
As the Hornady website is large it would be helpful if you could post the link discussing their FBI test results.
Your statement "many departments would not allow their use" sounds subjective.
Duty ammunition is often choosen by budget minded administrators so the absence of certain brands of ammunition is not necessarily due to the actual performance.
Many smaller departments in my area "copy cat" the ammo used by larger departments. A large city (population 300,000) near where I live adopted the 147 gr. JHP in the 9mm. Most of the departments in the smaller communities also adopted it simply becasue they figured that since the big city P.D. was using it it must be the best choice.
As already discussed what does the FBI test criteria have to do with civilian use?
On a personal note, I attempted to dispatch an injured Deer on the roadside, and a point blank shot behind it's ear failed to penetrate the skull with my 1911.
I once shot a opposum right between the eyes with a 38 Special and the bullet bounced off without penetrating. Was it a result of poor bullet placement or that all 38 Special ammo is underpowered?
I still stand by my statement that their products are light and under powered.
There are lots of good choices out there for you to match your needs for the tasks you need to perform..