That's an odd comparison. It would matter just which B&W speaker line you'd be comparing, and what application to use them.
The Powersound Audio offerings are fine theater speakers for a darkened room, and perhaps best if behind an acoustically transparent screen unless you actually like flat black rectangular boxes. From your signature list, it appears this is exactly what you have for a home theater environment so go right ahead. It's good stuff for that and well supported. The money in those is in the drivers, crossovers and box construction, not in the finish.
KEF R500, R200C, R100, SVS SB2000 sub, NAD T758 receiver, Pro-Ject RPM1 TT w/ Sumiko Pearl, Bluesound Vault2, Sony BDP-S480 BlueRay player, Samsung UN55JU6500F 4K LED TV, KEF M500 headphones, Sony CDP-CE500 CD changer.