I’ve got 3600 rounds through my mid-2022 P365X (all stock) with no mechanical issues. I do a basic field strip and clean every 200 rounds.How many rounds have you got through the Sig? They told me to stay away from the P365 because once you put around a 1000 rounds through them, they break and aren't reliable.
I have not found any credible (first hand and specific) accounts of any triggers “breaking” in P365’s. There were some reports of a trigger return spring issue with the 1st gen P365’s, but they were resolved through Sig CS and 2nd gens didn’t have the issue. (Issue was with the length of the spring end hook).
Ask the range rep what the specific issue is with each of those guns and the birthdate of each. Without that information, he is just a guy telling you a story.
Here is a good review after 8500 rounds:
[edited for typo]