CBP image: https://www.cbp.gov/sites/default/files/u50683/Ear%20Buds%20...
AirPods: https://www.apple.com/v/airpods/k/images/overview/airpods__d...
OnePlus Buds: https://image01.oneplus.net/ebp/202006/30/1-m00-15-97-rb8bwl...
OnePlus Buds are shaped like rods attached to muffins, while AirPods are shaped like quarter notes (on a musical staff).
Just GIS for Apple Airpods, the box looks significantly different: https://www.google.com/search?q=apple+airpods+packaging&sxsr...
The thing that caught me (and maybe you) is that the OnePlus pods have a flat part, and the CBP pictures have no flat part. But looking at the pictures from the review, the flat part is the end of the stem, and then the bulbous round part that goes in the ear is attached to the stem, with the flat part on the other side. The CBP pictures may have the flat part facing away from the camera.
I had to look at several of the pictures in the review which showed two pods next to each other to build a mental model of their shape.
[1] https://www.theverge.com/21331910/oneplus-buds-wireless-earb...