Are Irish ETFs better?

I’ve read that one should invest in Irish ETFs which copy the behaviour of the famous ETFs (S&P 500, NASDAQ 100, Europe index and emerging markets).
So, all these have Irish versions for some reason.

iShares Core S&P 500 UCITS ETF

iShares Core MSCI Europe UCITS ETF EUR

iShares NASDAQ 100 UCITS ETF

iShares Core MSCI EM IMI UCITS ETF

I don’t understand why the Irish ones are better. Less tax?

PS What are the names of the ETFs of Europe and emerging markets? Like, how to find them? The initials of them.