Just because I could and had nothing else better to do today. ;D Shot a round of each into plastic washer fluid jugs filled with water from four (4') away. Temp: 53 deg F. Bullet#1: .380 Speer GoldDot 90Gr GDHP Bullet#2: .380 CorBon 90Gr JHP Both bullets penetrated the first jug and came to rest inside the second jug. Both fully expanded. Without calipers it's hard to tell. The CorBon looks slightly wider. I've been carrying the CorBons, but have a full box of GoldDots. My critical defense rounds are backordered until May. Both the Corbon and the GoldDots function perfect in my gun. Just can't decide which round to carry and this test didn't help me decide.