The age old debate.
The .38 wheelgun (also .357 downloaded with .38's) is great for pocket or purse carry.
If the hammer is shrouded, you can fire through the pocket or purse, expensive but well worth it at times.
With good ammo, there's little difference between the two chamberings (9mm vs. .38) except capacity.
The wheelgun is able to be fired with limp wrists, a poor grip, upside down and however you can operate the trigger and will still fire all 5/6.
Personally I carry a snubby .38 in my back pocket when I work, as a backup gun. No matter which hand I use, how hard I shove it into someones gut, it's gonna go bang.
The small Glocks/Kahr's/etc are good but will jam when fired in a tight place, where the case can't exit the gun or the slide is stopped from fully retracting.
Personally I find the small wheelgun easier to handle in deep concealment.
Go over to www.snubtraining.com
and look at some of Michael DeBethencourt's stuff, he's one of the premier snubby instructors out there. Look for him on youtube also.
However, if she finds a good small auto that she likes, make sure it's reliable, unlike the wheelguns, when you downsize you often sacrifice reliability.
Over at "Hi-Powers and Handguns
" he goes into the snubby and compact auto'
s in some detail and provides chronograph data, just look around.