Anyway Dman777 that is my explanation of the disparity. I doubt the 10W, plating and geometry differences had as much to do with it as the JBC overshoot and the Pace undershoot to temp which can easily account for a 30C soldering temp difference.
Both stations are fast and have plenty of power, the Pace just regulates more accurately as it's close to set temp.
That's my conclusion as well. I prefer using the Pace now, not for any performance reason, just "the vibe".
Well, to me performance is spectacular too.. I was able to easily afford nice set of tips, and it works great...
Speaking of, I tried soldering on the large double sided unetched piece of FR4, and it worked much better than it did for you, Dave.
I did use two larger tips high performance tips, though. I think that it shows one more thing: today with cartridges, you compare tips with tips, not irons with irons. PACE and JBC have different thermal performance tips in same tip size, and comparing between the brands is hard to do.
When I was deciding what new system to buy price was important but not primary. I would have easily given 200-300€ more if it meant measurable gain in performance (in real world scenario) or much better ergonomics or smaller running cost. I tried using JBC and it didn't feel right. It heats really fast, but for small solder joints there is no difference compared to ADS200 (or Hakko FX-951 to that matter). Soldering on large thermal mass boards, they ALL need preheat.. It's not even about how much power (thermal energy) you have in the soldering tip, it's about thermal conductance of the board.
Also (this is personal "feel" thing) JBC handles and tips just look like they are going to break any moment. They do not feel or look robust. I have big hands and they look like a toy. That being said, I'm very precise and gentle to the board and soldering iron and newer apply any force. I'm sure JBC would have lasted me for decades without problem. But it bothers me..
And ADS200 handle is fantastic to hold, tip distance is great too, aluminium makes it cold even after being on for hours.
I had problems with JBC tip wetting too. They kept going dry and unwettable all the time, doing same things, same temperatures (on controller screen), same solder and flux. It is either they have different materials in tip coatings, or temperature was higher that stated. I have an (unverified) theory that maybe because of very aggressive heating profile, there are microfractures forming on surface that promote this kind of behaviour...Like with everything else thermal shocks are very dangerous. JBC's super fast heating might be the problem. There is also discussion in industry that soldering stations (like reflow owens) should have heating profile, and that too fast and large thermal shock is dangerous to components. So slower heat up is probably beneficial to components you are soldering. Preheat too.
And funny enough from JBC's own mouth:
https://www.jbctools.com/dynamic-soldering-profiles.htmlSo after all of this it was PACE for me and my use case.
What about JBC then? Well, while PACE has large set of tips, JBC has even more, including some very specialist types. If that's what you need, than JBC is best for you. JBC also has it's tools in more sizes. They have larger soldering iron than PACE, and also smaller ones, down to tiny pico sizes, that are so small they are hard to hold in your hand (my hand anyways), so if that's what you want, yeah JBC it is..
So to sum up this saga, for me (and my use case) it is both vibe and performance.
Regards
Sinisa