POSB CDM = $10, $50, $100, $500
UOB CDM = $2, $5, $10, $50 (Unsure about $100 )
UOB CDM usually have much shorter queue than that of POSB. However,
during some times, their machine's $2 box is full and thus do not
accept $2 note.
Other than that, I prefer UOB CDM over POSB CDM because you do not
need to bring down your ATM Card nor key in your PIN to do any Cash
Deposit and thus the transaction being more fuss-free. UOB only set
a Maximum of 3 Transaction a Day, but that doesn't affect us
normally, I believe it's to prevent traders from depositing their
earnings multiple times and causing inconvenience to other
user.