In addition to Yogesh:
Pros of Automation (which are cons of PXE):
1. Ease of use: Automation env boot is very fast as compare to PXE with not much extra knowledge required
2. No effect of firewall restriction: Firewall restriction will not affect Automation boot/working
3. Static IP handling: Static IP address can also be handled by Automation
Pros of PXE (which are cons of Automation):
1. Centralize: PXE has centralized management
2. Preboot Driver management : Driver addition and PXE Preboot image recreate is much easy
3. Upgrade: PXE image upgrades (for WinPE2.1) are not required for product after product upgrade
Thanks