I’m not going to remember everything, but the 2019+ has;
-hydraulic clutch (vs cable clutch)
-LED turn signals and auto headlight
-rider modes to turn off/on ABS (way less steps compared to 2017-2018 years)
-fuel gauge
-calmer throttle cam
-cornering ABS
and I think the 2021+ years have a new seat design, new anti-slip material and anecdotally I think the foam is different as well.
If you are comparing the early model DS vs 2019+ and the prices are close enough, I would get the 2019+.
-hydraulic clutch (vs cable clutch)
-LED turn signals and auto headlight
-rider modes to turn off/on ABS (way less steps compared to 2017-2018 years)
-fuel gauge
-calmer throttle cam
-cornering ABS
and I think the 2021+ years have a new seat design, new anti-slip material and anecdotally I think the foam is different as well.
If you are comparing the early model DS vs 2019+ and the prices are close enough, I would get the 2019+.