a feat b means that the track is produced by a and features b on the vocals
eg young parisians ft ben lost = young parisians made the track and ben lost sang on it


a vs. b means collaboration between producer a and producer b
psycho radio vs DAF = two producers, psycho radio and DAF, collaborared on the project

a pres b means producer a has been using the a alias for a while and now wants people to know he is using a different alias (b). it's often done to cash in on a famous name
YOMC & Nick Lunn pres Techno Punx = Nick Lunn and YOMC are announcing to the world they are going to be using a new alias, Techno Punx, to produce

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Tune of the summer:
Primal Scream - Some Velvet Morning (Luke Fair Dub)

Feat. usually refers to a artist who has 'featured' on the track in most cases as a vocalist.
e.g
Ozgur Can Feat. Nick Beaman - Not Even Winds

Presents implies that the producer/artist of that track is introducing a new alias/guise.
e.g
Mike Shiver and Daniel Haze Presents 'Perpetua'

Vs. refers to a collaboration that is like a 'permanent' long-term collaboration. A duo of sorts. It is not to be confused with 'and' .
e.g
Armin Vs. M.I.K.E - Intruder

This is true to the best of my knowledge although I maybe wrong.

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Spacy dreamer