What's the difference between 72-tooth and 90-tooth ratcheting wrenches?

A higher tooth count means a smaller swing arc, so a 90-tooth wrench needs less room to move than a 72-tooth one. However, high-trust r/Tools commenters note that in real use many people can't tell the difference because they use the wrench like a normal ratchet, and fewer, chunkier teeth can be more durable. Both are widely recommended; 90-tooth is a nice-to-have rather than a must.