In my opinion, absolutely not, especially for someone less skilled and more recoil sensitive like my wife. When going from 9mm to .380, I use FMJ in 380 to ensure adequate penetration. So I'm basically giving up expansion to get much better and faster shot placement. A few .380s to a vital area are drastically better than some 9mm JHPs low and left at a slower pace.
There are also a smaller selection of 9mm projectiles that will expand from a barrel as short as the 43s to begin with.