The comparison image below of the preserved Pirat 18 and HS-30 at Thun shows that there is only a conceptual similarity between the track systems of these two type. So, the Pirat series isn't directly related to the HS-30. Rather, Mowag and Hispano-Suiza were both Swiss rivals in the Bundeswehr's Schützenpanzer contest ultimately leading to the Spz 12-3.
Mowag Pirat 12, Pirat 14, and 3M1 Pirat 18 were trialled by the Swiss in 1960-63 (alongside the Swiss Sauer Spz Tartaruga, AMX-VCI, and M113 which became the Spz). The 1962 3M1 Pirat 18 evolved from the earlier Schützenpanzer attempts but incorporated the lessons learned (armour and remote armament) by Mowag's involvement with the German Projekt Marder.
BTW, Mowag was involved in the early development of Marder employing "elements" of Typhoon. Along with Rheinstahl Gruppe, Hanomag, and Henschel Thyssen, Mowag built Marder prototypes (series 1 - HM 1 and HM 2; series 2 - 2 M1/1, 2 M1/2, and 2 M1/3; components for series 3).
Mowag's Tornado was also an evolution of Typhoon.
Specifications: 3M1 Pirat 18 (as initially trialled by Swiss)
Crew: 3 + 9 Panzer Grenadiers
Dimen: Length 6.1 m, Width 2.9 m, Height 1.8 m
Armament: 1 x 20 mm Oerlikon in one-man turret (remote MG optional)
Combat weight: 18.1 tonnes (with turret mounted)
Max speed: 70 km/h
Oper. range: 500 km
Powerplant: 305 hp Ford 534 cid V8 (gasoline), transmission (6 fwd, 2 reverse gears)