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Original Griffon spiel in full within this video. Like Alpengeist (and Loch Ness Monster before 2011) there is a voice change for the "during your ride" segment.
Tempesto's spiels are now voiced by Matthew Edwards (head of entertainment).
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I think what's funny is that they don't even use the same "gates closing" and "please let go of your harness so it may be checked for you at this time" recordings that are at Pantheon, considering they now share the same spiel voice. There's a bunch of spiels on rides throughout the park that have the same dialogue such as "now hold on tight and we hope you enjoy your ride" and "due to the motion of this ride the smaller riders should sit to the inside of the car" and the same voice actors. However at rides like Battering Ram and Turkish Delight which both have the deep male voice, why are their ride start spiels different if they have the same dialogue and actor? Couldn't they have just used the same recording?
IIRC the older flat rides still have original spiel narration so it's the original voice actor (forget who it was but guessing it's mentioned in this thread)