Though my breeder quality RIRs haven't started laying yet, Julie said they were some of her best layers. Certainly, different strains would be different. The hatchery RIRs are great layers, however, since one died of internal laying and another is probably going to go the same way (as have two...
I love my original hatchery RIRs, too. Great layers and sweet ladies. My head hen was one, but I lost her this year to internal laying. The heritage RIRs are not only much darker and richer colored, but also, larger/taller birds than my hatchery birds.
Sometimes, you dont realize how different they are till you put them side by side. The last pic is in the bright sunshine, so appears lighter than they actually are.