Honestly, I don’t think this must be decided as per requirements from a technical perspective. I think it’s more about what is easy for the mainstream consumer. If I’ve never heard of the safenetwork and I’m going to use it, I want it to be intuitive and recognisable.
I think for all humans with internet, the way to go to a website is to do www.xxxx.ext. So in my opinion we should stick as close to that as feasible to make the transition from the old web to the new as easy as possible.