No one 1AA or 1CR123 is my favorite,
reasons:
- both bat./lights-config. are to big/heavy for EDC
- brightness/runtimes are not to great.
- hold and turn-on with the thumb is unconftable to me.
my favotites for this reasons are:
Fenix LD01 CE Q5 Flashlight because it's a incredible size/power combination and a real EDC this light provides enough light for almost every normal-situation.
Fenix Digital PD30 Black Premium Q5 because it's easy to hold (even for a longer forrest-walk, easy to operate, plenty light, not as heawy as others (good for backpacking), versatile with the trafficwand and the diffuser (for alltime car-light), no deal with discharching with CR123 even in cold-winters or hot days) ect.
so, IMHO 1AA are to big for a small light an do not output significant/usefull light.
1CR123 is to small for fist-holding and are not strong enough for a not-EDC.
i know this was not quite an answer to your question but in this case i felt like my thoughts/experience (i do/did own several lights)would be usefull to you.