No, they use completely different drive units, and the box loads (and design objectives) are also dissimilar.
Real quick I’m going to talk about the 3xrs as compared to the abbys both very good sound and Scottmoose himself liked the cabinet of the 3xrs which I bought per his thoughts on the omega3xrs cabinet !!! They will both sound great I lost a self built pair of abbys in a fire , was very happy with them !!!!!!!
I know Clark Blumenstien of Blumenstien audio has the rights to the Abbys and Bens and he also worked for Terry Cain. And as Scottmoose said drivers are completely different , both outstanding !