Your "field" is skewed in that you are comparing one single stack with two double-stacks.
Don't forget to look at the Ruger LC9 and the Ruger LC9S (striker fired version).
The pistols you mention are pocket pistols, and if you want a belt gun, whether IWB or OWB, then use caution to make sure of the weight distribution of the pistol. Pistols carried IWB that are rear-end-heavy due to short barrels and the weight of the ammo in the butt of the pistol tend to get "squeezed" up and out of the holster and if you are not careful, you could wind up with your pistol dropping out on the floor at a really inopportune time. This happened to an LE officer of my acquaintance, and since he was off-duty it caused quite a stir.
In IWB carry, barrel length is less critical, and you would be better served for the reason mentioned above, plus ease of shooting and hitting your target, with a pistol with a longer barrel that will help "anchor" the pistol in the waistband.