IPv6 is after than v4. If you're running v4, you're probably running NAT44, that adds latency as the NAT box has to do a table lookup and rewrite the header. V6

IPv6 is after than v4. If you're running v4, you're probably running NAT44, that adds latency as the NAT box has to do a table lookup and rewrite the header. V6 it just passes the packet through.