Fast becoming more ubiquitous than dear old Russ, yes its another Stevens & Billington transformer passive. Funkiest version I've seen yet - and three inputs
Peter (the guy who makes those) spends a lot of time over on diyaudio.com. I didn't realise he was marketing those creations now - though it was just for himself.
I've seen his S&B based pre before - looks very nice.
I know its something that has been brought up before, but what if anything would be likely to make the various S & B creations sound much different to each other ??