BoostBear
°—°
Ruby seems more uniform in how they evolved/easier to follow over +Red Iridium with all the variants that came about. Especially around the mid-late 2000's as you got Light Red & OO Red thrown in the mix as well.Ruby vs. Red is similar but obviously unique lenses. Will likely have a post on those soon too!
Or are you speaking about original Red Iridium found on M-Frames, that's now referred to as Old School Fire/resembles what Fruby looks like?