Not really.
That was about all that they had in common was 12 cylinders.
The case was different. the head design was completely different, it had a dry sump, and many carried a turbo or super charger. The Allison was more round in shape and the Pierce-Arrow was much boxier. Plus the intake/carb/charger system was completely different than anything found on the road. Notwithstanding, an Allison needed to operate upside down, which all hung off the back of the motor where a transmission would go.
The biggest thing was size it was about twice the size of the V12s you are comparing it to.