Mahamudra is more than a single meditation technique, while "vipashyana" covers a very big area. That's why I don't think so.
"To know by thinking falls into the secondary. To know without thinking falls into the tertiary." (Yangshan Huiji, X1405p58b18-19; tr. JC Cleary: A Tune Beyond the Clouds, p 43)
"While teachers of the middle way, mind only, transcendent wisdom, mantra, and other schools may have their own assertions, the fulfillment of those intentions is the same. There is not a single thing that is not contained within mind." (Gampopa to Düsum Khyenpa, in "The First Karmapa", KTD Pub, p 254)