Singapore government securities bonds interest rates?

So I weighing the difference between 1)keeping my CPF-ordinary funds where they r- and 2)investing them in Singapore government securities bonds.

The interest rate for CPF-ordinary =2.5%

So SGS bonds = ???

Im in my 30s and wont be able to withdraw any of the interest earned anyway. So I'm trying to find out if its more interest earned just leaving my CPF-ordinary money where they r