this brand uses the best quality Latex in the market.

Therapedic and Mylatex (same company) just start to focus malaysia market. before that, they focus on overseas market ie korea, USA, australia, europe, middle east...etc as those countries demand for the best latex mattress.

Mylatex = purely latex mattress

Therapedic = latex + coil

If wanna compare prices then find the "manufacturer". They should have a similar model under a diffrent name for their general market.
Everything the same except model name.
That is what I did and it works. Saved a lot as I was looking at a relatively pricey model. 

If the model not found online, the model is especially made for the particular dealer to sell so that the customer is not able to survey the price outside.