A:Answer I don't have Orbi, but my buddy swears by it for his 4500 sqft house. I don't know how strong his signal is in his backyard, but the Google wifi produces a strong signal all over a 13k+ sqft lot.
If I didn't go with Google Wifi, then I definitely would buy Orbi, due to the greater overall networking features, and faster wireless only mesh network. Thier wireless only mesh network is the fastest in the Industry due to the dedicated third backhall channel. Google wifi produces and overall faster wifi and LAN experience if you connect each access point via Ethernet cables, which the Orbi doesn't offer.
I had that chance and still chose the Google Wifi, due to the access control features it has for Individual connected devices, and the overall cost for a three AP solution.