I'm not saying that gm204 isn't amazing in performance/watt (970 in the performance/price too), I'm saying that I preferred as it once was (before Kepler and TMSC problems), when came out the top gpu and then the other, according to the scheme "from top to low". if you look at it from the point of view of the "entusiasth"* perhaps you'll understand what I mean. Amd do still in this way.
Do they?
They launched GCN 1.0 with Tahiti, then smaller GPUs, true. But then they introduced GCN 1.1 with Bonaire, waiting quite some time before bringing it to the high-end segment with Hawaii. Then they introduced GCN 1.2 with Tonga, which is similar to Tahiti and somewhat high-end but still below Hawaii.