The difference between RAM and RAM is as follows

• RAM(random access memory) is meant for temporary storage where as ROM(read only memory) is meant for permanent storage.
• RAM chip is volatile,means once the power is turned off , it losses the previously holding information ,where as ROM is non-volatile it doesn’t losses any information even though power is turned off.
• RAM chip is used in the normal operations of computer,where as ROM chip is used mainly for startup process of computer.
• Writing the data to a RAM is more faster than ROM

The below figure shows what the RAM and ROM chips are look like