Absolutely. You get different accents from one end of the DART to the other!
North Co Dublin
Proper Dubs in the city centre
South Co Dublin
I'm not really familiar with the NI accent. It sounds real enough to me but is he hamming it up a bit like the Kiwi guy doing his cockney thing in The Boys? Or is he actually really trying.... ? Although I'm still not sure if the kiwi guy really believed his accent sounded genuine or not