Actually the difference between apartments and condos is really the land size that the development sits on. If the land size is less that 35,000sqft (+/-, cant remember the actual specified size) it will be under the classification of apartments.
There used to be a difference between these 2 previously as foreigners were only able to buy condos and not apartments thus leading to higher chance of capital appreciation for condos due to the larger pool of buyers. This restriction has already been removed and thus there is no more restrictions for foreign buyers for apartments.
Nowadays the difference between apartment and condo has been narrowing as some apartments have better facilities then some condos, but due to the small land size, most apartments generally lack behind the condos in terms of facilities.
To select which type to buy will depend on your objective. Are you buying for-stay or to invest. Boutique apartments tend to be a very nice place for self-stay as the no. of household staying is lesser and you seem to know almost everyone in that project. Condos would be better for investment though as the larger land size and more facilities (usually) makes it easier to sell or rent out.
This is just my general opinion as there are actually a lot of other factors that determine the market price of the development.
For own stay, no need to think so much. Main thing is that you and your family likes the development and the surroundings. (eg. Amenities, transport etc.) Anyway you will not be selling in the short term and in terms of long term perspectives, the price of property will still be appreciating due to inflation...unless Singapore gets into a war with neighboring country and the value of our asset will plunge to "0"! It will be Doomsday for all our forumers. However how likely will this be?