SRAM stands for Static Random Access Memory, while SDRAM means Synchronous Dynamic Random Access Memory. SRAM is a kind of computer data storage that does not need to be refreshed often, while SDRAM is a kind of computer data storage that needs to be refreshed often in a particular synchronous interface.
SRAM is said to be static because it does not need the information in a particular location of the computer memory to be read and rewritten frequently to that same area. But in SDRAM, it makes reference to the microprocessor clock first, and then it responds to synchronize with the system bus of the computer.
In addition, the access speed range of the SDRAM is dependent on the clock speed, which makes SRAM to have a faster access speed range. SDRAM consumes more power than SRAM because of the need to refresh now and then. Lastly, SRAM is more expensive than SDRAM.