Hi Koster.

Funnily enough we do not hear much about Pocket Spring Bed Company [PSBC].  This Company is  high end arm of Silentnight.

As with all high end beds that utilise natural fillings as the upholstery, the only differences you will see is the difference in the spring system.

Vi Spring use calico encased pocket springs / Somnus use the Revolution Pocket Springs plus micro springs but not too sure without investigation what the pocket spring Bed Company PSBC use.

In your case the best way to go about this is to make a checklist and see which mattress gives you more for your money.

We as a Company normally advise that the more pocket springs, the less upholstery fillings used.

I hope the above is of assistance to you but if you do require any further information or advice, please do not hesitate to contact the office on 0161 437 4419.

Kind regards Julie