Found the website for the first 3 types of soil from the "Horti-Flora" brand (http://www.horti.com.sg/mixnp/mixnp.htm), they use the term "potting media" to generally discribe these "soil". Additional discriptions for the 3 potting media was found on the website, below are some excerpts:
"... all purpose potting mix for potting and re-potting... It contains added fertilizers for strong growth in the first few weeks."
"... Use it for mixing into soils and potting mixes to increase water retention ... It is perfect for ... and other acid-loving plants."
Seed & Potting Mix
"... is a soil-less mixture used for raising seeds and striking cuttings. ... assures strong root development. It also contains vermiculite and peat moss to prevent drying out."
The Horti Soil sounds good if you do not intend to bother with fertilising soon after potting. The Horti Moss sounds right for the "acid-loving" part, but it is stated that it is to be used for mixing into soils as soil conditioner. The Horti Seed & Potting Mix sounds good for the strong root development portion and contain peat moss which should make it acidic right?
I suspect that the Horti Moss might be too light and would float in water though. Let me try out and let you all know...
Also, just a note, the forth type of soil is not from this brand if I never remember wrongly.