If you want to export specific Mikrotik Router configuration only like Filter Rules, NAT, Mangle etc, you can use commend Export for example: In this case you want to export Mangle configuration under IP-> Firewall then:
1. Login to Winbox
2. Go to New Terminal
3. Then type ip firewall mangle export
You can copy the result and paste to other Mikrotik Router board and the configuration will exactly heve the same configuration.
You can also use the command Export to other menu in Mikrotik