The benchmark database entry reveals this Vega card has 64 compute units, a 1000MHz frequency and a 1200MHz Boost. On average, the listing suggests Vega is faster than the GeForce GTX 1080, but not as fast as the GTX 1080 Ti:
Bear in mind OpenCL benchmarks are not representing gaming performance. However, the fact that Vega is already faster than GTX 1080 in such an early stage, is indeed optimistic.