I'm sure other will disagree
Not me. I think that the nail on the head.
Something that stands out w/ the hh.357 is the amount of juice it holds. I cleaned one this morning - and out of just habit, primed it with 6 drops. That's not enough. -- For any of my regular 510s and 306s, right around 6 drops is what they need for initial prime. The hh.357 requires closer to 10 or 12.
I can run a regular 510 a lot dryer without getting a burnt atty taste. The hh.357 needs to give a little bit of a gurgly feedback (gurgly isn't quite the right word - it doesn't gurgle like a flooded 510 but you can feel/hear a little juice when you draw on it) when it is in the sweet spot. It just holds more juice in the mesh and draws juice from the mesh to the coil better than a 510.
The hh.357 I cleaned this morning has been in daily use since 1/24. I've consumed right around 250 ml with it. I have never before had an atty make it past 150 ml, and most don't quite make it to 100... and occasionally I'll pop a coil or just plain have one die well within 50.