The Black Diamond OZ, Wild Country Astro and Mad Rock Ultra-Light are all 5 to 10 percent heavier but also easier to handle. I find that overall the few grams extra of those three biners is worth it for having a biner that is easier to handle. However, the OZ is more expensive. Only the Mad Rock UltraLight Bent Gate is significantly less expensive and it is also a bit heavier. It's a tough call with so many great light biners available.
The FS Mini Carabiner has been replaced by the FS Mini II Carabiner--a lighter version. Keep reading to find out more.