AMD benchmark

[squ1zzy]

I would say different. The Vega 56 has 3584 cores and the Vega 64 4096 cores. The overall performance on the Vega 64 are better:

http://gpu.userbenchmark.com/Compare/AMD...3933vs3938

Also looking at mining benchmarks, the Vega 64 is faster:

http://www.legitreviews.com/amd-radeon-r...nce_197049

I would say it's all in the price and availability. If money isn't an issue or you can get both for the same price, go for the Vega 64.