No, that key is different in the middle part of the cut. No one has responded. I PM'd one member who has a Boomer 24, but no response so far. Thank you.
Edit: I finally found the part number for the key. It is MT40266850. The LS and New Holland part numbers are the same, and the same key fits the NH Boomer 24 and the LS XJ2025H, plus a number of other tractors, even some by Case.