The coils in those packs can be dry burned, but only a few times in my experience. Eventually the ultra-thin coil just breaks, or in the case of dual-coils the bottom coil never gets completely clean. Coils in rebuildables can be dry burned back to like new because the wicking material can be removed and replaced.
I'm liking my cheap little Smoktek RSST but will move up to something better when I can afford it. Lately I've started using excessively long wicks, keeping excess length in the tank. When the portion of wick in the coil gets too dirty, I snip it off, discard the dirty wick, dry burn the coil, and pull a little more wick out of the tank into the cleaned coil. Not any more difficult than replacing a clearomizer coil, just need a good set of tweezers.
Upside to rebuildables (IMO) is flavor, vapor production, lack of flooding. Downside is they tend to leak if tilted too much. But then again all the clearomizers I've used had leaking/flooding issues at some point, e.g. if they heated up, battery rand down, had a juice that wicked too well, etc.