After performing a similarity search, the matching structures are shown, together with the similarity value. As far as I can tell it is not possible to sort on the similarity value, so this would be a nice enhancement.
It's one of the wanted feature we did not start working on yet. Thanks to your feedback it get higher priority and may be implemented sooner.
What is the status on this feature enhancement?
I am sorry, the task is not progressing, I have updated it and added myself to its watchlist, I will keep you posted once I get an update about it.