Not sure. I can't feel the double beat of a premature beat but I can hear it on a stethoscope. Both pacs and pvcs are simply an extra beat so I would suspect both would sound like a fast beat, beat, pause but I can't say for sure.
I can feel the difference between PVC's and PAC's. The latter is more subtle, and the pause interval is much briefer that a PVC. For me, a PVC is a definite beat, bee-THUMP!.....pause.... beat, beat, beat...