I had read on a blog (I think AmyR's??) that the BISK was being discontinued. I haven't seen the Sizzix kit anywhere yet in real life.
Here is the link on the Sizzix page
Sizzix Texturz Kit
It is, naturally, out of stock.
It *looks* like the same stuff, but it doesn't give any dimensions. If I were a betting gal, I'd say it's the same thing, just repackaged under the newly-acquired Sizzix name. There doesn't seem to be a paisley plate anymore, though.