While I am absolutely not related to that business I inspected my own roof with my Spark and again with my Anafi several times.
And i guess what really speaks for the Anafi is the zoom and tilting the camera up. As both are pretty unique to the Anafi there won’t be much of an alternative out there. Usual drones can only look forward and 90 degree down. That will definitely be a problem especially when checking out roofs as you often can’t get closer without crashing especially when trying to check out the segment right under a roof, where my favorite friends (cough cough wasps

) like to build their homes. You can’t go higher with the roof above the drone but can’t look up either or get close enough.
That’s where the Anafi really shines. Zooming was a lifesaver when I tried to check out the solar panels on my roof and with the ability to look up I can check out those places mentioned above without the risk to crash into the rooftop.
Noise level could also be a plus for this drone when neighbors are around.