Eventually, but probably not until VEXcode hits V1.0. These classes are VEXcode only for now.
They really are the same thing, just different method names.
vex::task was the first implementation we did with methods similar to existing ROBOTC functions. It was then suggested that we create something for those already familiar with std::thread, that’s the basis for the vex::thread method names. They both use the same cooperative scheduler we have inside vexos.