Last summer when I was a Hilton Gold, I was matched to BW as Diamond Select. My understanding of this is that BW has a few more tiers than Hilton and to Hilton, this is their equivalent to Gold Hilton would not match me to Diamond with my new BW status (I tried) so instead did a fast track to Diamond Challenge (10 stays in 90 days) which I completed in July of 2018. I am a Diamond through March of 2020.