Holst's Mars sounds like the music the aliens play when they come to exterminate us. Audio Networks' Mars* sounds like the music the good guys are playing to rally the troops.
*and I read the comments under the video. I agree with them: it sounds like a blatant ripoff of Lux Aeterna by Clint Mansell
Hahahha you are not wrong about the Mars songs by Holst and Audionetwork.
Yeah, I guess if you just listen to the music without knowing who composed it beforehand, you'd assume it's a Clint Mansell song.