Close call. D1 and Ridgeback 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)
University mobile manipulation research labs integrating collaborative arms (UR10, Baxter) with perception and grasping experiments
Both are credible picks. Decide on cost and supplier proximity, not capability — the gap is small.