Ok I kicking DBV off. Unless someone says otherwise. I don't know any advantages that it has vs LSV.
DBV is better at being handfree. LSV is handheld or attachable to bong.
And unless I wrong. I am choosing the E-nano as the log on the list. Unless there is a better log out there. If there is correct me please!
E-nano, UD and HI seem to be the most poprular logs here today. I never had a single log unit, but I think I can imagine how they work.
UD is the artistic one. Each unit is different, original and beautiful. Lot of them are even built from many types of wood of diferent colors - an artistic beauty.
UD owners also report very good performance.
E-nano is the newest log vape, has temperature control and seems more evolved in performance. Apart from being made from wood as all logs all units look the same.
In
this thread a lot of people rated the e-nano the highest, that imo says something.
HI seems to me similar to e-nano, smaller size, and I've heard of waiting list for these.
Herbalaire (Cons are that people don't like pump, might not extract as good as LSV, and crucible problems as stated by others regarding taking it out and not breaking, it, but I really don't know specifically if this is a problem that is popular among it's users and I don't know for sure if it extracts less than LSV)
I would actually like the pump to be external in a bag blower - its's easier to repair or upgrade without opening the unit. Also look at the Volcano - the pump being inside is the main reason why it's so huge and heavy. Of course other people could have a different preference about this. I would be worried about the crucible reloading issues. As the herbalAire is a typical "espresso" style vape, one would like to reload easily to vape larger ammounts. Reloading is super easy in other espressos like logs and VXC. Herbie just seems to have the most hassle here.
You have now choosen your favourite model from each group. So now they get very hard to compare, you need to decide what type of vape you want.
Espresso (HA, logs): It's easier to be efficient especially with small ammounts.
HA is the bigger unit with bigger bowl, but harder to reload. More versatile (bags, whips, direct, bong), no glass. VXC's ELBs are similar to crucibles and are easy to reload, but VXC is already ruled out for different reasons.
Logs are tiny, very easy to work with and it is hard if not impossible to NOT be efficient with these. No whips and bags. Easier for bong use. Prettier, stealithier and smaller.
UD is the only glass-free one i can think of.
Wide airflow (LSV):
Need your involvement to vape efficiently - stirring, breath control etc. Easy to vape large ammount just load it all and rip it, stirring here would be somewhat equivalent of reloading in espressos.
Because of their ability to load a large ammount once it is good for large groups. But seems to me like an overkill for personal use if compared with logs.
Not that good with small ammounts. Airy hits and too long session for such a small ammount.