Looking at your setup with four separate zones totaling around 430m² plus the pathways between them, the YUKA 800 would be the more appropriate choice. While the YUKA Mini 600 could technically handle your total area, the 800 model will provide several advantages for your specific situation:
With multiple zones, the mower needs to travel between areas, which consumes additional battery power that isn't accounted for in the standard coverage ratings.
The YUKA 800 will need to recharge less frequently, which means fewer charging cycles over time and potentially longer battery lifespan.
If any of your zones have challenging terrain or thicker grass, the extra capacity gives you a comfortable buffer.
Future-proofing - if you decide to expand any of your zones or add additional areas later, you'll have the capacity to accommodate them.
The difference in price between the 600 and 800 models is relatively small compared to the long-term benefits of having that extra capacity for your multi-zone setup.
Thanks, hope this helps Mark