From an Amazon answer: "The different colors indicate different coatings and blade aggressiveness (sharpness). The blue box are the basic stainless blades. The green box are sharper and are chromium ceramic, tungsten and platinum coated. The orange box are the same sharpness as the green, but are coated with platinum. As a guy with sensitive skin and fairly sparse facial hair, the green box give me the best shave with the least irritation." I've never used Derby blades, but from my experience with those coatings, Blue is likely to be sharpest and roughest. I expect it has a PTFE coating of some sort. Green will be smoothest, but not as sharp. Orange will be sharper than green, but smoother than Blue. ...probably.
Derby Premium is a better blade than the Derby extra IMO. Folks with very sensitive skin and light beard seem to like the the Derby extra .
I haven't tried the Lions yet, but I would place the Diamonds Pro Excell just below the Extras, and the Bluebirds in 3rd place, so my list would be: Usta Premium Bluebird Concord Parker Extra Diamonds Pro Excell Please note that I've only tried 1 blade each of the Concord and Diamonds Pro, so their placement may change as my sample size increases.
Not a fan of the Lions. Still would rather use them than a cartridge. Sent from my SM-G965F using Tapatalk