It’s difficult to compare Hong Kong with anywhere in North America. That said, I agree with your general divisions. I’ve stayed in TST, Yau Ma Tei and Sheung Wan, and loved the “organized chaos.” I’ve also stayed in the relative civility of Mid-Levels and Wan Chai, and only the pub scene adjacent to Mid-Levels in south Central near the Escalator is anything near what westerners call “inviting” (I’m ignoring LKF); it’s actually quite a lot of fun on a sunny Sunday to walk from Causeway through Central when all the Pinoy ladies are out together on their one day off. But it’s still a very tall city and every part of it is busier on a human scale than almost any part of Montreal. Oh, and it’s easy to be fooled into thinking it’s a concrete jungle, when in reality it’s like Singapore, among the greenest large cities I’ve visited.