I'll be honest with you guys. I just did my blind tasting of S-189 vs. Diamond, and.... I really just cannot tell these apart. I thought maybe I could on the first sip, but after that, they really just tasted identical. If anything, I found S-189 might have had more hop flavor, while Diamond tasted less hoppy but also more bitter... but this was like splitting hairs. I really don't know if it was just my imagination. I got the same attenuation and FG with both, so I'm almost thinking maybe... these are super closely related.