Under certain firewall settings, using vpn proxy is much better than fully route. If you corp/uni firewall is set to block any changes to the routing table, then bolehroute will be useless in this situation, whereby if you are using proxy, the tcpserver proxy we have will emulate https traffic which makes the firewall to detect it as such and will let the traffic thru.
For those doing highly secure transactions, bolehroute will be better since it hides the use original IP and encrypt the data as well. In terms of server config, both are almost the same except memory usage for vpn proxy is higher while for fully routed, the CPU is higher.
All our proxy servers uses a 4gb-8gb ram while routed uses 2gb-4gb ram.