Not sure, but you should test it. All of these manufacturer specs are complete crap because you don't know how they derive their numbers. They really aren't absolute. A few years ago IPS had better viewing angles and color fidelity, PVA technology typically had deeper blacks andn better response times. This was if you compared the best displays using each technology.
You could keep an eye on barefeats or ask if that's something they plan to test in the near future.