Difference Between 116201 and 126201?

[Rose141414]

Hi all, I’ve had my eye on a 126201 for a long time now. There is a 116201 for sale at a local shop here for a great price. I’m trying to figure out what the difference between the two models is. I’m assuming the 126201 has some improvements — my guess is an upgraded movement and maybe more? Does anyone happen to know for sure what the differences are? Also, does anyone happen to know when the 116201 was in production? From what I can surmise it was mid 2000s to 2019, but just wanted to see if that was correct. Thanks for any help!