Close call. D1 and Nextage Fillie trade wins across the matrix.
Readiness, uptime, navigation & connectivity
Price accessibility and ROI clarity
Payload, speed, runtime & labor replacement
Environment fit, footprint & long-term upside
Multi-floor security patrols in facilities with stairs, slopes, and cluttered outdoor perimeters (warehouses, construction sites, utility substations)
Electronics assembly in mixed human-robot cells with frequent changeovers
If immediate deployment is the priority, choose Nextage Fillie. If the goal is to be ready when D1's capabilities mature, track it.