What is the different between the two layers. In terms of economy which one is better.

I want to know why a lot of people rear the brown layer- isa brown

House lets enlighten ourselves

Brown layers are more efficient than black and less susceptible to heat stroke. There used to be a difference in the sale price as spent layer becos black are usually heavier than brown but now they are priced alike.
If you want to maximise ur layer bird go for brown. There is a school of thot that says black are hardier birds than brown in my experience brown birds exposes bad management faster so if you handle ur birds right brown birds iSA brown rules!

eazeefix:
Brown layers are more efficient than black and less susceptible to heat stroke. There used to be a difference in the sale price as spent layer becos black are usually heavier than brown but now they are priced alike.
If you want to maximise ur layer bird go for brown. There is a school of thot that says black are hardier birds than brown in my experience brown birds exposes bad management faster so if you handle ur birds right brown birds iSA brown rules!

thanks for ur contribution. What about egg size

present

In layer production you need to define ur target, egg size or egg numbers and feed consumed. The difference in egg size is minimal and the egg numbers neutralises any difference. Egg size is dependent on layer weight at first egg, protein(amino acids) and energy content (oil). Give a balanced ration and ur birds will perform to their genetic potentials if properly raised.
People have their preferences I prefer brown I have achieved 98% livability from day oldto 18weeks but never got that with black.

Thanks bro. I appreciate ur response.