Number of gates ?

Hi all.

From the datasheet i got from internet for FPGA Cyclone IV (EP4CE6E22I7N) do not mention the number of gates. What does its means? If compared with flex 6000 family(EPF6016TI144-3), its do mentioned the number of gates but not the total RAM bits. It's like vice versa between the two FPGA. Can someone explains it to me please. Is it related between number of gates with total number of RAM?

p/s : Attached is a comparaison i made between 3 FPGA (i need to replace the left one)

Thanks and Regards