Both of the apartments you listed have lots of families, are really central and the apartments are large. They are considered "old" by Singapore standards - but favored a lot by expats. If you are looking at those two buildings you might also consider Four Seasons Park, The Claymore, Regency Park, Beverly Hill, Colonade.... these condos
all have exceptionally large condo
s for being so central and are older buildings. Cairnhill (as mentioned) is also very convenient if you are looking at Chatsworth (walking distance) and is also close to ISS. There are a couple of older buildings that have big units (Cairnhill Plaza to name one) but also quite a bit of construction in the area (although living central that is a given).
The one thing about these older buildings is that you want to make sure you are in a renovated unit... and in Singapore sometimes the agent will say "renovated" - but that means a coat of paint and maybe a kitchen cupboard or two. The older units also come with older plumbing, pipes...etc... just kick the tires while you're viewing