apparently your LSD isn’t that great. Cid just makes everything enjoyable, at least it has for me.

Psytrance sounds more futuristic and exotic. Usually more organic sounding. Trippy. How can someone not know the difference?

What defines a tune as psychedelic is the mind-blowing quality and impact a tune can have on a person looking for a psychedelic experience. This means that every tune could be a psychedelic one, as long as the listener is capable of having a psychedelic experience to the music that is being played. However there is of course music that is somewhat better in creating results like stated above, and there is probably also music which isnt capable of doing that at all. Who decides?...You…

i would say psychedelic music can be anything you want it to be… really its just a name.
a psychedelic experience means something you have not experienced before, right?
something unknown to you… something new.

I’ve done a lot of psychedelics in my life.  I was also fortunate enough to live in a part of the world where top notch psy parties are a part of life.  When you hear killer goa played at a party on a Saturday night, and then head to the after party in Nishi Azabu (ex-geoid) to hear normal trance/techno while you are still tripping…. the difference in effect is profound.

Another important definition of psychedelic music is the content, added by its creator. I mean,  if a DJ, compositor or musical engineer had been ridden by various gods (sorry for the Gibsonish expression, couldn’t help it ) and remembers how the sounds were like at this time, then he/she’s tempted to make the music sound similarly.
For example, cannabis. Maybe it’s only for me, maybe for also other people and drugs, but ganja catches a sound you hear and repeats a piece of its end furiously in an increasing frequency, till it fades out behind your sight, and you find yourself you were gaping for a while, following it with your mind. Whenever I hear a sound effect in music like that, for example in drum n’ bass or In Dub   then I know the author knows what he’s composing about.
Another good example are these spacial water dripping effects, (like these on Gamma Goblins or Shpongle Falls), these probably resemble a consciousness, expanded by DMT or acid, don’t know, but I suppose so.

I think it’s almost impossible to explain what makes a tune psychedelic to someone who’s never used a psychedelic substance. Try explaining what tripping is like to someone who’s never done it!
I think psy trance appeals more to the LSD type vibe, being very hypnotic and trance-like (obviously) in nature and also having very “visual” sounds that stimulate the hallucinatroy patterns and creating a sense of dislocation.
Techno on the other hand, suits the MDMA experience better, teasing the listener to a peak and relying more on creating an series of exhilarating rushes by changing the volume and intensity of the sounds. Again though, a trance-like state can be achieved due to the repetitive and slowly evolving themes.

As I said at the start - to one who’s not experienced listening to music in that state, any descriptions probably make limited sense.

There’s my best attempt!  :D

Psytrance has to be challenging in some way to listen to, if it isn’t - it aint psy.

It has to push the boundaries technically and what is aurally acceptible, otherwise its just normal trance.