[stooker]

All my mechanicals keep great time, definitely way better than 30-60 seconds off a day.

I was bored in a meeting one week, and so I synchronized my daily beater watch with the digital clock (that showed seconds) in the room... and a week later at the same weekly meeting it was only off 7 seconds. It has a fairly basic ETA movement, not COSC certified, and I am definitely not gentle with it.

Try to get some objective data, even if it's crude testing, for your two watches. If it's more than ~10 seconds or so off a day, I'd get them checked out. A half to full minute off a day is pretty bad for higher end mechanicals, or TBH any modern mechanical watch worth wearing in my opinion.