GPS/RTK robotic mowers with heavier weight create the best lawn stripes because they combine systematic cutting with effective wheel striping.

Why heavier GPS/RTK mowers excel at striping:
GPS navigation ensures precise straight-line mowing patterns
Heavy wheels create the actual stripe effect by pressing grass in different directions
More ground pressure = more pronounced stripe contrast
Systematic parallel lines (not random patterns) maintain consistent striping

Best options for striping:
Luba AWD - heavy all-wheel-drive with RTK precision
Husqvarna Automower 550 EPOS - GPS-guided systematic mowing
Other heavy GPS/RTK models with planned cutting patterns
How it works:

GPS/RTK technology enables straight, parallel cutting lines
Heavy wheels bend grass in alternating directions with each pass
Alternating cutting directions enhance the light/dark stripe effect
Weight + precision = professional-looking striped lawn

Bottom line: You need both the systematic straight-line cutting that GPS/RTK provides AND the wheel weight to physically create the stripes. Lighter robotic mowers simply don't have enough ground pressure to make visible stripes, even with GPS guidance.