I think it would be helpful to sort case fans by bearing type.
Fan bearing types are probably among the most frequently misreported (or at least, misleadingly-reported) specifications out there.
But why does the CPU cooler category have a bearing sorting feature?
Years ago manufacturers were significantly better about naming their fan bearings. Over the past few years we get more marketing terms obfuscating the actual spec than direct information.
Ok
CPU
CPU Cooler
Motherboard
Memory
Storage
Video Card
Power Supply
Case