Contrasts create friction. Ireland's positive recent record against the All Blacks creates the obvious point of friction but boil that down further and it exists more so within their playing styles.
There are no more two contrasting teams remaining at this World Cup, no more contrasting quarterfinal. Even South Africa, with the likes of Cheslin Kolbe, are more adventurous, more enterprising, than Ireland.
The contrast that separates Ireland and the All Blacks comes from a guiding philosophy to be prescriptive or reactive, to stick stringently to patterns or to embed structures but ultimately play what you see and embrace freedom