And that would be the non-X model. Aimed at the sub 280 USD price bracket the Tahiti GPU gas been respun. The product has been released to counter the NVIDIA GeForce GTX 760. Basically the R9 280 is... AMD Silently Launches Radeon R9 280 - Tahiti rises
You are confusing rebrand with respin. Tahiti XTL is a respin. And ya the bitcoin miners pretty much screwed over AMD for marketshare.