[zamadatix]

The other methods are about defining different meanings of what "going around" actually is while constant latitude is a special case of many such methods, e.g. great circle, not a new definition of what going that way means.

[munchler]

I'm not sure what you mean, but a circle of constant latitude is definitely not a great circle (except on the equator).

[zamadatix]

You're 100% right, I conflated great circle and small circle there.