About 8oz empty vs 9-11oz for the other small .380s. For me the difference was so small I went with the bigger cartridge. Plus the P32 grips are SO thin it wasn't as pleasant to shoot for me.
Yup. you reach a point in lightness where unnoticed is still unnoticed.
My small carry gun ownership progression right after I got my CT pistol permit in 1989 was.
1) Smith and Wesson 6906 - after I bought it, "hmm. this thingis heavy and bulky. I'm sure it has nothing to do with the canvas belt and uncle mike's holster I'm carrying it with.
2) Seecamp 32 - the one gun to have when you always want to carry a gun. At least in 1990.
3) KelTec P32 - a bit larger than the Seecamp but much lighter. Such a piece of crap that I resold it before I got rid of the Seecamp. Still carried the Seecamp.
**About this time Idiscovered the joys of quality holsters and belts. So I started carrying my Kahr P9 and Glock 26 much more often in addition to the pocket guns.
4) Ruger LCP - a bit larger than the Seecamp. But lighter. Ran like a top. sights. . . at least it had something. (the seecamp has a bare slide top). Recoil was surprisingly vigorous. Trigger guard would slam into the front of my trigger finger on recoil. I bought a case of .380. I shot like 300 rounds in 5 or 6 years.
5) Kahr P380 - only marginally bigger than the LCP. Much much nicer shooting. Softer recoil. No trigger finger issues. Real sights. Feels like quality. A definite winner. The perfect pocket gun???
6) Glock 42. I got this to replace the Kahr. But it was too big to be an "always" gun. If I wasn't going to carry it in my pocket, I might as well carry my Kahr P9.
This gun however was SWEET shooting. IMHO, the best shooting glock other than the 34. (Once the original horrible connector was replaced)
I ended up selling it and keeping the Kahr.
IMNSHO - the P380 is the best pocket gun you can buy.