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And this is where they differ. Stakenet doesnt require people to download full chains for maximum security because of how the Multicurrency Light Wallet works, when you start the wallet it syncs to the MN network which is hosting the various blockchains. You can take part in the beta when we add more people to it if you are interested. I have been using it for a while now and it works great so far and the one click TOR privacy setting we added 2 weeks ago is really nice. It seems Xrouter idea is similar but if it is still reliant on Atomic Swaps I dont think it will be viable to the larger audience and if its still in prototype stage then they are somewhat behind as XSNs is pretty much ready for launch just doing final bug squashing and cleaning up UX.
Onchain Atomic Swaps will never gain traction due to their limitations like respective blockchain confirmation times and fees, its not a viable option for adoption. If it was so brilliant then everyone would already be using Blocknets DEX and wouldnt struggle for liquidity. This is why XSN uses Lightning Network to complete their swaps.
I wouldnt base your assumptions of Lightning Network based on whats currently available on BTC/LTC and others as the XSN dev team are far beyond that and have fixed many of the issues Lightning Labs and others have been struggling with. There is a reason why the XSN dev team were the ones that updated LTCs core for them to bring it up to speed with the latest standards:
https://litecoin-foundation.org/lightning-network-collaboration-with-x-9-developers/