The shorter domain is available, and in my opinion a better candidate. However, I doubt there would be much interest in them even as a pair.
Deed poll is too easy and small cost, as demonstated by many frivolous examples of name change. There are no hurdles, so it is hard to add value by offering a service to make the process quicker or easier.
I had to make a minor change to comply with strict ID rules now in force, so I have experience of this.