De nada.
You're right about subject evaluations of subtle nuances making things a close call.
I generally use a belt scabbard myself, having tired of IWB some years ago. I like my slacks, jeans & shorts to fit the same in the waistband regardless of whether I'm wearing a particular weapon & holster combination, and when I got back into motorcycle riding I found that even my slim Kydex-type IWB holster & 3913 wasn't as pleasant on a day long ride as OWB (or holstered pocket-carry with another type of weapon). Just depends on the user, their preferences and the circumstances involved.
I'd give at least as much consideration to any perceived difference in overall weight and balance in the hand during live-fire as to when wearing it holstered, though. Sometimes those subtle nuances may make one platform or model a bit easier to shoot when it comes to controllability, recoil management and accuracy.