Is the S9 also 10x more likely to find a block? Seems like as long as it’s being used for heat too that is an efficient option.
Discussion
10x more power per TH/s. A single S9 vs a single bitaxe is more like 95x more power usage, but the S9 gives 10x TH/s.
The bitaxe uses a newer, more efficient asic, that's all.