both great rounds.
The golden sabre is a super super round, will give 100% expansion and at 102 grains a nice wallop and they work great in the lcp's.
the dpx is another super super round, the all copper bullet by Barnes willgive 100% expansion(looks like a rose petal) and will retain 100% of its bullet weight, it won't fragment apart.
Some tests have show the golden sagre to give better penetration than the dpx but , as tests go, one has to decide for himself.
Both great rounds, I have um both in my 380 and 9mm.
Penetration and expansion means nothing like some one stated if the round is hung up on the feed ramp. So to me the most important thing for any defesne round is 100% reliability...