I ain't got a dog in this fight, except that for the longest time, I never owned any kind of special O2 sensor socket or wrench. And I do this stuff for a living. I used a 22mm open end wrench on just about everything, until I took on a new car line at work that requires the socket, since the sensor is recessed slightly into the exhaust manifold to where a combination wrench won't fit on it. I still use a 22mm open end wrench on just about everything Ford.
There is no ultimate right or wrong, IMO, it's whatever works.