I have had Bourbon Reds, Spanish Black, Blue Slates and Narragansetts. The Slates were good, the Spanish Black was aggressive, and the Narragansett fight a lot and the Toms act like they don’t know what to do. I never had any of those problems with the Reds. So I’m not sure which exactly is the best breed.
And I’m not sure if there is really any difference in the taste of the bird, or an appreciative difference in the growth rate between breeds. Mostly what I see is the difference in the looks. From my experience the Bourbon Red is the breed for the back yard grower. And the one I'll go back to soon also.