Stardew will probably last you longer. Golf Story isn't a short game (I'm at 11 hours and still have like, 3 "worlds" out of 8 to go). Stardew seems like a perfect portable game though, like doing a day or two on the train to work or something like that. Golf Story is less "stressful" in that you never feel like you've wasted a day (because there isn't a time mechanic) or should've done x instead of y to get the best out of your time.
Really though, they're masterworks all, you can't go wrong!