Same underperforming you see for 9mm Luger according to that website.
9mm Luger tends to underperform when:
a) bullet weight is equal or less than 115 grain
b) bullet expanded (hollow Point).
http://www.luckygunner.com/labs/self-defense-ammo-ballistic-tests/#380ACP
9mm Luger performs well if:
a) bullet weight is 124 grain or more
b) not expanding (FMJ or lead bullet)
380 acp underperforms when:
a) bullet weight is 95 grain or less.
b) bullet expands (hollow Point)
380 acp performs well if:
a) bullet weight is 100 grain or more (at least has to be minimal 95 grain)
b) not expanding (FMJ or lead bullet)
With both you can get good Performance just use for 9mm Luger 124 grain and not expanding bullet and for 380 acp use 100 grain and not expanding.
Specially for the
380 acp the bullet has to be an FMJ oder solid lead bullet and never you can use an hollow Point.
Using hollow Points in 380 acp gives you not the Penetration you Need.