For serveme SEA (OVH Singapore), your ISP, which is also my ISP, routes through Los Angeles for the return journey. This leads to a ~300ms scoreboard ping.
With SDR, this drops to 195ms for me.
For serveme AU (OVH Sydney), again it gets routed through LA, both directions this time. 330ms scoreboard ping.
With SDR, this drops to 284ms for me.