Will there be two different battery tubes, one for 2x 26350 and one of 2x 26650? If so, will the SC04 come with both tubes like the SC26? Even haikelite.top would not reveal any information about that.
The emitters can produce that much light - only just in high-CRI, but they can. The ROT66 is direct-drive and limited by the emitters’ forward voltage. The SC04 uses a buck driver and a battery configuration that’s always well over the forward voltage, so it can drive the emitters much harder in theory.
I also tend to assume listed output from Haikelite is a wish rather than a spec until a third-party test shows otherwise.