Unlike Taiwan, Singapore is a multi-ethnic state where English is the lingua franca, and the government has a very heavy focus on racial harmony etc.

Also, Singaporean of Chinese descent are generally not huge fans of China. While some older folks have drunk the CCP Kool-Aid, among the young there is a lot of straight up racism/prejudice against "PRCs" (mainlanders), especially around ten years ago when there was a huge wave of immigrants, many of whom didn't even try to assimilate (learning English etc). Taiwan, by contrast, is viewed very favorably.