If it has digital temperature control then it has something resembling a CPU and memory. If it’s analog then it’s probably just not that accurate and will drift over time without manual calibration.
I have a pinecil and direct heat soldering irons blow away non direct heat irons like your weller (and I think this ifixit one). Once you switch you never want to go back. Which is really disappointing because I don’t think this new ifix it one is.