I'm with Sean on this: there's not enough info to make any kind of relevant comparison. Since there is similar performing ammunition available now in both calibers, the major factors in deciding which way to go all have to do with the gun: recoil/handling, gun reliability/longevity, mag reliability, ammunition performance in whatever the barrel length is, etc.
As far as 8 vs. 11 rounds of ammo on hand, the difference is so minimal that it's pretty far down on the list of important things to consider when buying a pistol, IMO.
- Gabe