In this video Todd at Project Farm puts 15 models of scissors through their paces. He tests scissors by KAI, Gingher, Heritage, Klein Tools, Henckels, Fiskars, Bianco, Ultima Classic, Westscott, Livingo, KitchenAid, Singer, Scotch, and Stanley.
The scissors were tested for sharpness and durability after cutting through 1,000 feet of paper, 20 passes through cardboard, 10 passes through aluminum sheeting, and 10 passes through cardboard.
In the end, the expensive KAI scissors (at $78) performed best overall, but the Fiskars ($26) and Klein Tools ($24) models did amazingly well, too. I have the Fiskars and love them. And after watching the video, I threw another pair into my Amazon cart.