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1GB RAM; 0GB (Lite) eMMC Flash without WIFI
Upgraded processor BCM2711, quad-core Cortex-A72 (ARM v8) 64-bit SoC, more powerful performance
More options for RAM (1GB/2GB/4GB/8GB), competent for large-scale data compilation
Faster eMMC Flash storage, up to 100 MBytes/s data rate, which is four times faster than the CM3+
Option for fully certified radio module, the same one used on Pi4B, supports either PCB trace antenna or external antenna, more suitable for industrial applications