@Trusar CERTAIN Yixing are more porous than certain CZ. There are many kinds of Yixing clays, all with different properties in terms of porosity. The way they are fired further determines how porous they are.
Or are you saying a Zhuni clay Yixing is porous? You’d be the first to say so... hongni is less, or not porous than Zini. Etc. The list is long and full of exceptions.
Furthermore clays of vintage or antique pots adds even more variety. CZ as well has very poorly produced pots which can be very porous.
I would be careful to say everyone is wrong, especially with an experience based on two teapots...
As often, everything depends.