1, operating system differences. If you install the system directly, there is only one system. For example, Apple has a macos installed, so you can only use software that is compatible with the functions provided by this system. After installing the virtual machine, the virtual machine can virtualize two computers and run MAC and windows at the same time.

2. Environmental differences. Whether the virtual machine environment is 32 or 64, openwrt system can run, and many embedded devices are 32-bit systems. However, the virtual environment where the system is directly installed, whether it is 32 or 64, cannot run.