Like what what beside the RPMs ? The Indy heads are copies of the old Batten W2s I believe. The Indy X heads are magnum based. B1s if they are still available are nothing like LAs. Mopar Performance only offers Edelbrocks that say Mopar on them and W2s now. The commandos are gone, The Magnum R/Ts are gone.
Im more into stock restorations or stock looking cars now so it doesnt matter to me which are better because chances are Im going to LAs but everything seems to be W2 based or Magnum based now so I dont know why they would do that if Las are better