I'd say Guinness is already losing ground in Cork as Beamish is just so popular, and cheaper.
The trend of younger people drinking Guinness is different in Cork, in Cork younger people are turning to Beamish and they're loyal to it.
Beamish a far more consistent pint in Cork than Guinness IMO. I find the quality of Guinness in Cork to be generally quite disappointing.
The worst thing about being a Guinness drinker is you never know what you are going to get. Anything from slop to Nirvana if you risk going to a pub you haven't been in before.
The owner of the pub with the best pint of Guinness in Ireland told me it is all down to glass hygiene/management. Apparently, contamination with detergent, furniture polish and other chemicals is the main cause. For example, washing dish/furniture cloths in the same sink/machine as the glasses can ruin an otherwise perfect pint. The day that publican left, the Guinness in the same pub became undrinkable.


