From the runs I have done, it seems IGT seems to be slightly slower than RTA. Now I'm not entirelly sure if this is down to how long you spend on the "start" screen or not or if there are other factors at play.

For now though, it seems consistent enough that I'm happy to keep timing the runs by IGT, but of course this is open to change should there be enough demand for this.

Please feel free to comment on any findings you have below, or share them in the discord.