They are different lah!
S$2699 is median household income (could be income from 2 or more people in the household working) / number of household members.
S$4232 is for full time employed resident is for 1 individual for "Median Gross Monthly Income From Work (Including Employer CPF Contributions) of Full-Time Employed Residents".
So that means the S$4232 is = total annual pay (including employer CPF contributions) divided by 12 months, and include employer CPF contributions, all bonuses (including 13th month pay and may be 1 or 2 months extra bonus pay), and over-time pay too?
In the past, they will show gross median pay before employer CPF contributions, but now they don't show anymore. Still, you can calculate yourself to exclude CPF contributions (since these money are all lock up in CPF and can't be spent for daily expenses).
So, actual median basic monthly pay excluding employer CPF contributions will likely be = ((4232*12) / 15) / 1.17 = S$2893 p.m.!