Doubt it. Otherwise, PS5 is going to definitely be the cheaper device. Also, rumors are that Navi is going into PS5 exclusively. If true, this means that MS would most likely try to match its performance with Vega.
Exclusively just for one console and not for Desktop/Laptop GPU's?. I find that hard to believe. AMD would be insane to completely abandon the desktop/laptop GPU market like that and leave that market for Nvidia to consume.