Chony,
you are right: the drumkit on the HardRock style is called "Power Kit 2"; on the Tyros 1 the same style used the Studio Kit 1. Tyros 2 has two Power Kits: 1 and 2.
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Korg Kronos 61 and PA3X-Pro76, Roland G-70, BK7-m and Integra 7, Casio PX-5S, Fender Stratocaster with Fralin pickups, Fender Stratocaster with Kinman pickups, vintage Gibson SG standard.