From the article and their website, it doesn't seem like KnuEdge's compute units are spiking neurons. Spinnaker and IBM 's TruNorth using spiking neurons to compute.
Well, not quite. Spinnaker is OPTIMIZED for spiking neurons, but in theory you could run standard computations on it. It is just really messy (speaking form experience).
The main idea behind Spinnaker as far as I understood it is "cheap cores, lots of them, architecture for message passing and load distrubtion vaguely inspired by human brain". This rang similar on a first read