Short answer is yes  to both. You should visit Hong Kong AND Macau. They are very different places despite (or maybe because of) their different place in history as European colonies. They are also so close together that you can easily visit both on the same trip.

Although Macau is a often thought of as a day-trip destination, multiple days are needed to properly explore this multifaceted spot. Macau's history and culture runs deeper than its mega-casinos. Here is a 3-day itinerary for experiencing colonialism's quirkiest outpost.

Marina Bay Sands Casino:\n\n There are 1,600 slot machines and more than 30 private gaming rooms. It is one of the best and the largest casino of Singapore.

The way forward\n\n This is because of Malaysia's unique dual system of law  the Sharia-governed Syariah courts for the nation's Muslims (over half of the total population), which strongly oppose gambling, and secular law that is less rigid in its take on gambling.