Yeah,
All your proverbial planets look like they're in alignment.
But, those two CK flex hoses are indentical, so they'll both mate to the SafeLoc/Dinse connector fine, but they'll also both take a 9 or 17 torch at the other end, so you don't really need two hose assemblies. I mean, you're not also buying two SafeLoc/Dinse connectors, i.e., one for each, even though that would make for the utmost convenience in switching from a 9 to a 17 torch.
No, the more cost-effective way, and pretty fast way too, to switch from a 9 to a 17 torch is just to get a cheap torch head (non-CK, without the added hose assembly), and swap it onto the one hose assembly and Dinse. Also, Everlast-Australia undoubtedly sells a torch/hose/assembly with the Dinse and gas quick-connect built-into the hose assembly.
Here's a 17 flex head torch for $8.99, delivered, tax-free, to the North American continent. I find flex head torches like these to be just as good as the CK stuff, which cost a lot more, needlessly.
https://www.amazon.com/Welding-Torch...G+17+flex+head
You can find a 9 torch that would do as much if you bought a CK assembly, or even a Everlast one with the 17 torch included.
Yeah, that is not a gas-through Dinse, since it has the quick-connect on it.
Here's the Everlast link, and even though it doesn't show the TIG torches separately, I'm guessing you could call a order one cheap than the CK stuff from a N.A. source.
http://www.everlast-welders.com.au/category/Consumables
Also, Token Tools in OZ sells welders that use the same Dinse and quick-connect line that Everlast does, so you could undoubtedly buy a torch assembly from them too.
https://www.tokentools.com.au