According to the XFX product page, the two factory-overclocked, or as XFX calls it "tuned by XFX", 8GB RX 480 graphics cards, both come with a custom backplate and the same blower-style reference cooler. The AMD Radeon RX 480 Tuned by XFX - Custom Backplate XXX OC works at 1288MHz for the GPU while the RX 480 Tuned by XFX - Custom Backplate Black Edition works at 1328MHz for the GPU. Both also come with 8GB of GDDR5 memory clocked at 8000MHz.
The lonely AMD Radeon RX 480 Core Edition 4GB lacks "tuned by XFX" label and works at 1266MHz for the GPU and comes with 4GB of GDDR5 memory clocked at lower 7000MHz.
This allowed XFX to be one of the first AMD AIB partners to have a semi-custom, factory-overclocked RX 480 on the market and hopefully XFX also tuned the reference cooler as this one did not do well in reviews. According to details at the XFX website, "tuned by XFX" means that the card is factory-overclocked at BIOS level and fine-tuned for optimal gaming performance.
Currently, all three are listed in Europe with prices set at €219 for the 4GB Core Edition, €269 for the XXX OC version and €289 for the overclocked RX 480 Black Edition.
Currently, the XXX OC version is available at Caseking.de for €269, while XFX RX 480 Black Edition is listed as expected soon for €289 and also available at a €299, inc case you can't wait.
Retailers/e-tailers in Europe have plenty of Radeon RX 480 graphics cards in stock but these are still all reference-based while full-custom versions are expected later in July.