Neither thread type is good at pulling faces together, unless your first face has a hole larger than the thread, so if neither face is pre-drilled/punched, then you [may see note below] have to DIY drill at least one of them..
I don't know your terminology [TEK vs ZIP]. To me they're self-drillers or self-tappers. Self-drillers need no pre-drilled hole, of course, they make their own. Self-tappers must always be pre-drilled.
If the elements you are fixing together have one hole already, then self-drillers every time… on a drill-driver. You cannot do them by hand.
If you have no drill-driver, your choice is down to self-tappers only.
For self-tappers, if neither face is pre-drilled, that means you also need two drill-bits to make two hole sizes - one that doesn't tap followed by one that does. This is just a time-waster.
This puts it firmly back in self-driller territory, where you only have to drill the first face.
The swarf argument is not in the game. Both methods leave swarf.
Note: There is a trick with self-drillers [& I suppose self-tappers, though I've never tried it with them], that if you drill through the first face without hitting the second, then let the bolt spin a few seconds after it's hit the end of the thread, that will strip the thread in the first face & allow you to pull the second face in tight, so long as you don't over-tension as the second face pulls in. This takes a bit of practise to get the drill tension just right, but is easy enough once you have a rhythm.
If you cannot leave sufficient gap between faces once assembled, you can do this pre-fit then back them out again. You've damaged the first face sufficiently that it will not impede the tightening action as you pull up the second face.
I used to get through self-drillers by the kilo. I love them ;)