That's an interesting thread feihong, wonder if those figures will still stack up today. An advantage for the inner city to me is the security of having good tenants and demand for rental, and also it's relative resiliance in tough economic times (similar to what we're experiencing now). You still have to pick the right property though, a shiny OTP apartment is not one of those.
I had a choice a few years ago, to buy an apartment in Prahran or a house in an outer suburb like Melton. I picked the arpatment and don't have any regrets at all, while the yield isn't great I have no trouble getting tenants at all. The CG has actually been reasonably solid, even these last couple of years. Nothing spectacular, but also nothing to keep me up at night.