Bielefelder is very calm and friendly chicken. They are not larger than RIR and don't lay a lot of egg like GreenFire Farm mentioned on their website. If you like nice calm and friendly chicken, go with Bielefilder and Breeder Orpington.
It taste like Dorking or other heritage breeds+msg with regular feed. I tried more than 30 various breeds over the years. It is good dual purpose breed that worth raising because the cost very much the same as other breed, good layer, and has great flavor. There are about 1600 various breeds...
I have eaten about 2 dozen of White American Bresse. They taste pretty good at 5-5.5 months. The meat sweet and little gammy. I just feed them just regular laying feed and scrap from the kitchen.