There is not so much info about this product yet. So I purchased one today and took some images from the software...
https://youtu.be/DQyI8Qsos8Q
I have also S60 but wanted to have a watch that can survive two 18r rounds. Sometimes S60 has managed to do that but normally not.
Battery lifes S60 10 h vs. S40 15 h
At least I can use one while other is in charger :)
I have not tested this at golf course yet.
Other benefits in S40, I think
- show distances to hazards etc.
- "Big number" may be more useable (in S60 I don't like that the shot distance is hidden when using this)
Sure there are many things missing too but they are mostly related to something else than Golfing.
EDIT: Garmin comparison (scroll down)
https://explore.garmin.com/en-US/golf/