We have lived in both and concur with everyone else that housing is cheaper in Singapore. We live on Holland Road in a 2100 sqf flat (3 beds and 3 baths) and we pay S$3200 pm. Holland Road is also very central and has lots of buses going to and from Orchard/CBD. If you don't mind going for older blocks, you generally get more for your money. Agree that Singapore much more relaxing and better quality of life than HK. Good luck.