The Robert Walters survey has better credibility.
I have doubts in the payscale report after seeing this:
http://www.payscale.com/research/SG/...alary/show_all
“Median Salary by City - Country: Singapore (Singapore)” - Johor Bahru is included as one of the category. Also, where is Gering?
The people who compile this statics know nothing about Singapore.
http://www.salary.sg/2009/salary-survey/#comment-5093