Which do you prefer: Dolby TrueHD or DTS HD Master Audio?

Hello people. I recently purchased new speakers (Acesonic 510 speakers)and a pioneer 819 av receiver capable of decoding TrueHD and DTS HD. Since my previous setup was only able to decode dolby digital and dts, how much better are the new formats? I imagine they are pretty noticeable considering the difference in quality I heard while comparing dts to dts 96/24. What are your thoughts about the new formats?

-I also have to admit a personal bias favoring DTS.

So I've done some research and have come up with the following:
If mastered properly,
DTS HD MASTER = DOLBY TRUEHD = UNCOMPRESSED PCM

The reasoning behind this is that both DTS HD and Dolby TrueHD are "lossless" compression. Therefore when executed they should (in theory) playback the same as UNCOMPRESSED PCM.

I am getting a blu-ray player next week and I am curious to see if there is in fact a difference between the formats in reality.

Not much difference, except for brand name. I pretty much pick whatever's available, since lossless means lossless.