Lossless audio, differences

[ijokr]

I'm sorry if this post has appeared too many times but I keep looking for info and still have doubts.
Between DTS-HDMA, TrueHD and PCM, shouldn't they sound the same since they're all lossless. I don't have a trained ear but in the movies that i've seen, I find PCM the best, then HDMA and then TrueHD. Of course the first thing that comes to my mind is the movie itself, one having better audio than the other one, in this case the better one having PCM (i.e. underworld) and I haven´t tried that many movies with PCM and Master Audio. I find the PCM track and MA being more "open" if I may say, as in the True HD being more muffled. I can hear more details in the first two, rather than just bigger bangs.

So my question is, why they don't sound the same being lossless?