While perusng the arduino website, I ran across this:
https://www.arduino.cc/en/Reference/Ethernet
According to the info on the page at the link above, the built-in Ethernet library, IDE v1.8.10 as of
this writing, supports W5100/W5200/W5500-based devices which - as I understand it - include both v1 and v2 shields. So it’s possible he did use a v2 shield. Either way, you should be good to go.