Kef KUBE subs and PSW subs

[Afrochap]

Hello all,

I'm looking at the Kef range of subs, in particular the the Kube 2 and PSW 2000.

I'm just wondering if the Kube is a newer iteration of the PSW or both exists in parallel?

Also which of the two would you say performs better?

Just to be clear they will part of the following component

Kef egg satellites 5.1
2 x Onkyo Dolby Atmos overheads
Pioneer VSX LX70

Thanks