what's the difference between cyclnone II and cyclnone III device?

Correct, you need to recompile this project as the FPGA is a different device so the target has changed.

also notice that cyclone II devices have M4K memory blocks, and cyclone III have M9K memory blocks. so you should check if you use these memory blocks and have set them correctly or (thats mostly better) have set the memory type to AUTO so quartus will use the correct memory type.

for example if you use the wizzard to create on chip memory for example 2kByte (2048x8) the cyclone II fpga will use 4 M4K blocks whereas cyclone III will use 2 M9K memory blocks