Collectiblend appears to be a pricing website for antique camera gear, pulled from current eBay pricing and other online sale locations. There’s an option to build your own collection; I’m currently waiting for the admins to approve my submission.
This is what it says on the label: A Comparison of the DJI Spark, Mavic Pro, and Phantom 4 Pro Video Quality. Honestly, I find it hard to see the difference in quality between the $500 Spark and the $1200 Mavic Pro, which could be the deciding factor in the model of drone I buy next.