I haven’t owned the JC5 but have owned the original Parasound A21 and a Coda No.8 V1. Owned both simultaneously. In my system the A21 sounds considerably more “effortless,” with better bass. However, the Coda was a little more resolving and refined. Ultimately I preferred and kept the A21.
That said, I actually prefer my Yamaha A-S2100 to the Parasound. It digs even deeper in the bass and has better synergy with my Satori Helios speakers.