For example: I have Rooms above the Bookshop and Rooftop Shack, both of which grant a hand size of three cards and a 'significant' defensive bonus to Knife and Candle. Does it matter which one is my 'current' lodging?
No; as long as you own the lodging you can use the associated card, so if they grant the same hand size then there is no difference.
You'll get faster responses on the other forums:http://fallenlondon.org.uk/viewforum.php?f=3
We only check in here occasionally.
Well, I did register there about three weeks ago, and never got the confirmation email, and that wasn't my first try at registering there either.
So sod them.
I go instead to Failbetter Games Community Forum, which accepts my Facebook login (not unlike Echo Bazaar itself) and doesn't make me jump through deliberately draconian registration hoops.