G'day AlexP,
The best fella to talk to would be Steve (CCR Diving)almost in your own backyard. He resides in Perth & is a distributor for both units here in Oz.
I'm pretty sure Steve can give you a Demo on both.
I dive the classic KISS & can only say that they are a terrific breather, low cost, reliable , easy to travel with, good source of parts & great service from Jetsam or the agents here. Having said all that What more could you ask for ---unless you wanted to be an Auto pilot (ECCR).
