Both of these units give me extremely thick, dense, powerful and satisfying hits. These 2 are actually the vapes I use the most right now. Really like the fact that I do not have to heat up the Herbnail every time I want a hit. I have the timer set for like 4 hours and can go hit it when I want to. And the hits are simply phenomenal. Bowl never gets too hot to handle, and being able to drop a dab on top just makes for a very special experience. Of course the Sup requires a bit more fuss, but always worth it. Paired with my Zob 8 arm-tree, these hits are just off the chart. Since I got the glass tubes, I use the Supreme every single day. Really like that I can use it without grinding, just break off a few small pieces of a nug and stuff the tube. It is so hard to compare these 2, because they both provide top-tier hits. For flower only....... Hit Quality is a very slight advantage to Supreme. Ease of use is a slight advantage to Herbnail. Overall,....just like my kids, I love them both and could never pick one over the other. They are both superb in just about every way.