Your gravity vector will have to be uniform, otherwise your crustal will turned curved.
Your centrifuge will have to be either very large, or you will have to find out how to do that without convetion
The effect on a stationary point sized object is equivalent in all three cases. When your object moves then the spinning artificial gravity can be distinguished. When your object is no longer point sized then both gravity and spinning fake gravity can be distinguished from linear acceleration fake gravity.
EDIT I mean - we’re talking about convection right? Which I understand to involve circulation of air currents ... does your link have anything on this topic? I guess with a large enough centrifuge there might be no difference but it was unclear whether what was being referred to was large habitable centrifuges or the type more commonly found in labs ...