They grew up together, they studied together, and yesterday they celebrated together.
The parallels don't end there. Both plan to study medicine next year, the former at UCD and the latter at the Royal College of Surgeons.
"I never compare myself to him. But other people compare us," said Fiadhnait (18). "People think we must be really competitive, but we are not like that. We supported each other a lot."
Enda (19) concurred: "We both helped each other in biology and chemistry."
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Also celebrating was Cathal Dempsey (17), youngest son of the Minister for Education, who said he plans to study business and languages at the Dublin Institute of Technology after scoring 315 points at Boyne Community College, Trim, Co Meath.