Hi,

There's no "better". Banana plugs are simply more convenient, easier to connect and disconnect than bare cable, and it's less likely that a strand of the cable would fray and short the connection between the speaker connections.

Both methods use a contact connection, which is entirely adequate to transfer the high-level signal from the cable to the speaker posts.

Regards,
Alan

Alan Lofft,
Axiom Resident Expert (Retired)