What are the differences between a UK and Irish passport, aside from nationality?

Here are some differences between a UK and Irish passport, aside from nationality ¹: - Visa-free travel: Both UK and Irish passports offer visa-free travel to 175 countries. However, there are some differences in visa requirements for certain countries. For example, UK citizens need a visa to travel to Eritrea, but Irish citizens do not. - Travel to the EU: Irish citizens can live and work in the EU without restrictions, but UK citizens face restrictions due to Brexit. - Travel to the US: UK citizens can enter the US under the Visa Waiver Program (VWP), but Irish citizens must apply for an Electronic System for Travel Authorization (ESTA) approval prior to their flight to the US. - Validity: Both UK and Irish passports are valid for 10 years for adults and 5 years for children under 18. - Cost: The cost of a UK passport is currently £82.50 for a standard adult passport book, while an Irish passport costs €75 for a standard adult passport book. - Design: UK passports have a blue cover with the UK coat of arms, while Irish passports have a burgundy cover with the Irish coat of arms. - Language: UK passports are printed in English only, while Irish passports are printed in both English and Irish.