The biggest variable here is simply that of "comfort."
Our individual perception of that is, by definition, subjective.
I've found that the comfort of a holster also depends on the choice of pants and belt. I switch between appendix and 5oclock position depending on my wardrobpe.
^ And this is the other biggest factor - support gear as well clothing (the waistband of the pants itself will exert pressure on the holster) will also drastically impact "comfort." Different gear interface differently - how an extremely stiff and rigid belt interacts with a more pliable belt is one factor that drives the distinction between IWB versus AIWB setups. Similarly, differences and nuances of how each of us choose to set up the same piece of clothing/gear/holster can cause differences in perceived comfort that can seem out-of-phase with the subtly of any such changes.
Even if though any two of us are built similarly and share very similar physical traits, this simple difference in how we perceive sensations can well mean that we will have completely opposite opinions of the same holster, set up the same way, while wearing the same clothes.
As with several other members in this thread, in addition to the few holsters that I actively use, I also have a much larger collection of holsters that I've run-through over the years. What's more, this collection continues to grow even today as I continue searching for the next best thing and as my gun undergoes changes, too (advancements in lights, mostly, driving this change, but I will soon need to look at a micro-RDS enabled setup, too). While I'm nowhere near as
BuckyP of GlockTalk (
https://www.glocktalk.com/threads/diary-of-a-holster-junkie.1522065/) I'd be lying to say that I haven't spent a significant amount of money on holsters.
In one of my other posts today, I relayed my experiences with my EDC gear and how it has evolved over the last 10 years -
https://www.thearmorylife.com/forum/threads/xdm-3-8-compact.105/#post-2758, and the same can be said for OWB:
Here's my good buddy and I (the puffy looking Chinese guy on the left, the one with the 4.5-inch XDm9 in a camo-pattern holster) in the Alliance PD Training Facility's shoot-house, getting schooled by the amazing Joe Weyer at the Practically Tactical 2017 Partners Shoot-House Listeners' Weekend:
* Image courtesy of Practically Tactical
The weather was really nice those days and nights, but its not always so kind in NE-Ohio. The picture below was taken two years prior, at one of Varg Freeborn's "OG" classes on his private range here in NE-Ohio. On that day, we saw both snow and freezing rain:
^ That same holster (that entire setup, actually) was also what I used 4 years prior in Chris Costa's classes -
- as well as at Chris Cerino's Marksmanship Enhancement Clinic the year before -
Because of the light on the handgun for the shoothouse class (as well as the war-belt), I had to move to a different holster than my usual OWB setup. The evolution of not just my gun (no-light to light), but also what I wanted to do with that gear (simple flat-range versus the problem-solving hell of the shoothouse) meant that my gear had to evolve along with it, too.
Unfortunately, there's a bit of trial-and-error, here.