I can confirm you that Swissair flights out of SIN are still operated with MD-11.
But : Swissair is getting a new A 330 nearly every 1 to 2 month (s) so the chance of flying A 330-200 are getting bigger with time (maybe on the way back).
Be aware that most services on the personal screens must be paid. So to travel SIN-ZRH with 17 free films and Nintendo games, great service ans so on, take the SIA 744 service SIN-ZRH leaving just 5 minutes after the SR flight (in my case SIA was delayed, so we took off an hour later!) and moreover on the next gate : I saw the same MD-11 in SIN and then in ZRH as both plane were just following themselves!