Well now, it just depends, like with most other things ...
This is strictly hypothetical for me, as I don't believe Kel-Tec pistols are on the CA Approved list ... However ...
Based simply upon the five P-11's that I watched come through our off-duty qualification and CCW courses of fire, of which only one of them were able to complete the course of fire without repeated malfunctions ... I'd still opt for the J-frame.
Of the couple of P-32's that I've seen come through the courses, both of those actually finished the short course of fire without functioning issues.
Not a statistically significant database from which to draw any conclusions, granted ... but watching four out of five people experience repeated malfunctions with the little pistols didn't make me want to run out and buy one as a defensive weapon ...
I suspect that some of the malfunctions may have been more shooter-related than actually pistol-related, especially since they're diminutive polymer-framed pistols. One of the guys (experienced cop shooter) was only experiencing malfunctions when shooting 1-handed. His functioning issues resolved themselves as soon as he started the 2-handed portion of the course of fire. Itty bitty polymer framed pistols and "shooter grip issues" aren't an unknown combination of events which can sometimes potentially result in a less-than-satisfactory range experience ...
I prefer to think of the range as being as close to an 'ideal' set of circumstances as a shooter is likely to encounter ... no 'real threat', reasonably controlled conditions, clearly identified shoot & no-shoot targets with safe backstops, no 'real world' distractions, reasonably safe, firm and well maintained surfaces for standing and movement, the shooter is starting the activity in reasonably good health, without injury, and able to expect what's about to occur to some extent, etc., etc..
Personally, I prefer a defensive weapon which has shown itself to be the least susceptible to shooter-induced functioning issues, especially under adverse conditions, for both the weapon and the shooter. If it's only going to be acceptably reliable under ideal range conditions, when the shooter is expecting to shoot, isn't unduly stressed or physically affected by things like pain and/or injury ... then it may not be what I'd choose for a dedicated defensive weapon.
A revolver, especially a DAO revolver, is still a reasonably simple and viable choice for some folks ... but not for others. I say this because not everyone is seemingly as likely to be as familiar with proper revolver skills as they were when I was growing up. I almost wonder if revolver skills are becoming a lost art ...
The J-frame can be even more difficult for many folks because it's a SMALL revolver, which introduces still further potential skills and familiarity issues for the users. Reduced grip, heavier DAO trigger (with an actual revolver DA trigger stroke, meaning length of trigger travel during the stroke and then for trigger reset), reduced size sights and short sight radius, just to name a few ...
J-frames aren't for everyone.
For those folks who spend the time necessary to acquire proper DA/DAO revolver skills, and familiarize themselves with the operating requirements of the shorter barreled revolvers, they're still an attractive choice in personal defensive weapons for many folk's perceived needs ... mine included.
As you can see, though, some folks have reported receiving satisfactory results from their K-T's.
This is one of those issues where the prospective purchaser and user will have to do their research to the extent they feel necessary, which may likely include arranging to test fire examples of each weapon with good quality ammunition of the type they anticipate using if they select that type of weapon ... and then making the best informed choice they feel is appropriate for their needs.
With personal choice comes personal responsibility ... and it's not like you can't change your mind.
Many of us have more than a single preference and choice, especially when it comes to anticipated conditions and perceived needs ... or if we simply happen to like a particular firearm, and choose it for use as a defensive weapon ...
I don't pretend that my choices are going to satisfy anyone other than me ... nor do they need to. (They do, however, still have to satisfy the policy requirements and regulations of my agency.)
Oh yeah ... short answer? For me? J-frame.