I had the older W4S Dac 2. I was not very impressed with it. I ended up using it on a secondary system and using a 20 year old Mark Levinson No 39 CD player as a DAC which I thought sounded a lot better. I eventually replaced this with an Yggradsil A2 which easily beat both the ML and the W4S. I've recently replaced the Yggy with a Denafrips Terminator which I like even more.
I have only heard the PS audio DAC briefly, but from this limited exposure and what I've read about it, I think I'd prefer it over the W4S dac if the latest W4S sounds anything like the older one.