From my curiosity, I just ask where in the world are you coming from? : D
Since everyone is justifying their reasoning I'll throw in my controvert two cents. Went for sky rocket because:
1. Tornado might be rougher so awkward to reride loads (the Madrid one isn't super smooth I don't think). Seeing as the park are offering us something nice I'd like to think we do reride it for a bit. Skyrocket is also their newest cred.
2. Sky rocket has a much lower throughout so might have a bigger queue during the rest of the day (and you can nearly fit the whole group on one train of the intamin so it would take longer to get everyone on the sky rocket, meaning rides would be better spread through an hour).
Doesn't really matter but thought I'd play devil's advocate.
Disappointed that Trombi didn't make the cut though!
are you sure you dont want to ride a volare for an hour instead?