Total air hole size though isn't the only thing that needs to be considered and is misleading. This has a smaller chamber volume compared to other rba's/
rda's of this size I've seen (as I've mentioned pics don't tell how small it is in there), so velocity through there is going to be increased vs dumping that air into the side of a big chamber which stalls the incoming air flow velocity past the
coils and has poor distribution across the coil(s) which results in less vapor and the need to dump more air into it to compensate.
The Strata's holes don't just dump into the side, they distribute equally all around and into a small chamber, so airflow across the
coils and the resulting vapor is increased as well as the cfm moving through there.