I too would like to see a decent comparison. Also what's ultimately going to matter is up-front cost per synapse and ongoing cost per synapse-second (from power consumption). That's really all that matters if you are planning to make a cluster out of them.

Of course, there could be some new and interesting uses in embedded devices where sheer throughput doesn't matter so much as total power usage, for moderate processing power. For example, the AI in Roomba and similar robot vacuums is pretty rudimentary, so appliances like that could maybe get a boost from this.