A few days ago, I wrote about the accelerated miles earn rate for selected OCBC Voyage Card holders of 3 mpd for all overseas spend, with no minimum spending or cap on the miles earned, from now until 31 Dec 2017.
It seems that UOB has followed suit, offering 3 mpd for UOB PRVI Miles cardmembers on all overseas shopping, online and offline, as well as dining transactions, from now until 31 Dec 2017.

Unlike the OCBC promotion, the UOB promotion is only limited to the first 3000 registered cardmembers who meet a minimum spend of S$1000, and who has met the qualifying overseas spend.
So, it seems that the OCBC promotion trumps UOB hands down this time.