In the beginning there was the porter then the brewery started to produce the stout porter that they were stronger than normal porte and dome with first used malt so they were better and more expensive..than the normal porter..
For what I know the RB was used for the first time in ireland by the guinness for save the money of the malt..
But during the world war the porter style was dismissed and guinness begin to become famouse like stout..
Only with the new way of US craft brewery in the 80's porter comeback to be brew...so there is some cpnfusion between porter and stout..also bjcp description is very simillar exept for some point of OG(porter can be stronger) an d IBU EBC(dry stout could be darker and bitter) and they tell that you can use same ingredient but if you have a look on CAMRA you will find different line..for example RB for stout and malt for porter...
I hope that you can understand what i try to explain...unfortunatly it s little hard for me...
For what I know the RB was used for the first time in ireland by the guinness for save the money of the malt..
But during the world war the porter style was dismissed and guinness begin to become famouse like stout..
Only with the new way of US craft brewery in the 80's porter comeback to be brew...so there is some cpnfusion between porter and stout..also bjcp description is very simillar exept for some point of OG(porter can be stronger) an d IBU EBC(dry stout could be darker and bitter) and they tell that you can use same ingredient but if you have a look on CAMRA you will find different line..for example RB for stout and malt for porter...
I hope that you can understand what i try to explain...unfortunatly it s little hard for me...