Blue Mansion has lots of tourists. It's an actual attraction, which may or may not be ok with you.
SAVV location isn't very good, IMO, on a busy street.
Seven Terraces is another option. Haven't stayed there, but passed it a lot. Ok location. More modern than heritage. E&O is worth a look, but too big for me.
23LoveLane ticked all the boxes, but don't get a mews room. In these heritage places you want a room in the main house.
23LoveLane has a room called the Suite Heritage. I'm guessing that's the one you're referring to?
E&O and 7 Terraces look nice but slightly out of my price range. I'm going to be in Asia for a month so can't afford to go luxe each night.
Update: Decided to go with The Edison Georgetown (right around the corner from 23LoveLane.