Cool, that was fun to watch
I've never used or seen a Harder & Steenbeck, so that was interesting. A couple of things I noticed --
The nozzles have seals on them. If you look at Iwata and Paasche airbrushes, all of the seals are on the body, rather than the detachable front parts. This is actually really nice, because once you're done for the day, you can dunk the tip components into an isopropyl alcohol bath and just forget about them, whether it's for an hour, a day, or a week. if there's seals, you can't do that.
The more expensive airbrush looks to have a really cool preset handle feature. You can click it to engage it, and click it again to turn it off, which is way more useful than the usual knob at the end. That being said, anyone who's using a 0.15 or 0.20 airbrush is probably way skilled enough that they'll never use the preset handle anyhow. The irony of the preset handles is that they often come with higher end airbrushes, but it's really a beginner-level feature, as you quickly acquire the skills to pull the trigger back the appropriate distance and don't need such a thing (
IMO, anyhow).
The cutaway handle (hole on the side) is REALLY useful, however, especially on those small airbrushes. It lets you quickly pull the needle all the way back (on the Iwatas, even further than the trigger will allow), and if you then push the trigger down to allow air through, that will clear a lot of clogs.
Also, the tips are different. One is a crown and one looks like it has holes drilled in it like a bolter
In my experience, especially for small needle airbrushes, crowns are awesome. The air flows through and out when the needle is close to the model, like when you take it off entirely, but it still offers some protection (drop an airbrush with no crown and there goes the needle). I have no idea how the vented front works, though.
