they are close to the same size - Okw may be a little bigger - the bath room is generally (there are some small bathrooms in studios at OKW but not very many - in my experience)
BWV has the sleeper sofa instead of another bed - so it appears to be larger.
Oh I do like the sofa at BWV better than BCV - the ones at BCV are very rough - I like a softer sofa.
both sinks area in BWV are out of the bathroom - in OKW only the kitchen type sink in out of the bathroom area - the other one is in the bathrom.