The similarity is that they both hold a lot more inside than it would seem possible from the outside.
I cleared out most of the things left in Lookfar today - and it looked as if I had cleared out a Tardis - there was so much stuff. I wonder if the Doctor ever clears out his vessel - - .This is also proof - if proof is needed - that I watch too much TV.
I have left Lookfar so that I can sail over the winter if the tides and the weather are ever right at the same time. Today - cold and not enough wind, and the tide high too early in the day.