Not a particularly very good question, because they both fit Techno music.

If a musician doesn't have the technical skill to record and edit down music, then a studio technician is normally on hand.

If a studio technician can't play an instrument and needs one played for whatever reason, then session players are on hand.

It's only when you get into the science of sound (psycho, dynamics, harmonics, micro timing, etc.) that musicians aren't particularly good.

And visa versa, technical peeps generally not that great at emotiveness through notation and use of orchestral layouts (part of advanced music theory).

Truth is though, neither can learn about how to produce Techno from a book or education. That part is a personal journey, probably with the aid of substances and a deep passion and sense for the genre imho :)