Has anyone done any comparisons, between the Epson K3 inks,& the Canon Chroma life 100+ ink sets?
Any major differences?,quality,color??
I'm not the best person to answer this, but seeing no other attempts, I'll suggest a clarification: are you sure those are the two inksets you want to compare? Because:
(1) Epson [UltraChrome] K3 inks are pigment inks, while Canon ChromaLife 100+ inks are dye inks. (Also, Epson's current dye photo inks are called Claria HD, and Canon's pigment inks are called Lucia, Lucia EX, or Lucia Pro.)
(2) The inksets that Epson specifically calls K3 have been replaced in new models; AFAIK the last K3 model was the R3000, introduced in 2011 and replaced by the P600 in 2014. The inksets that Canon specifically calls ChromaLife 100+ are the current ones, used in every Canon dye-ink photo printer introduced since August 2009.