One of the differences is that there is an underlying purchase and sale of commodities so as to comply with the ‘Murabahah’ structure mentioned here.
The economic substance and risks are similar as conventional fixed deposit where you place your funds for a fixed period with returns decided upon placement.
The good thing is, unlike a normal Fixed Deposit where you receive your interest only at maturity; CIMB’s Why Wait Fixed Deposit-i account allows you to collect your returns in the form of profit, upfront.