The simc rotation does a slightly more complex set of logic around optimizing starlord. The total improvement as a percentage of overall DPS is relatively small compared to the simpler set of logic that I prefer to use/recommend for players.
This slight difference is enough to tip the balance on when starlord is “better” than incarnation. Most players aren’t going to get maximum use out of starlord. I avoid rotation logic that is overly complex unless it gives a huge gain and becomes the play style that every player is attempting to use. Most players do not know how to get even as much out of starlord as my slightly simpler optimization does.
Incarnation, being a long cooldown, is one of those talents that will be very strong or feel kind of “meh” depending on how particular encounters time up. That is really what will decide between these two talents. I think that the gear we recommend for starlord builds will ultimately be better for most players. If you think that you can squeeze out a bit more DPS with different trinkets or a bit more haste, use the customize feature to push the optimizer towards your preferred direction.
When I have more time I could probably take a look and explain the exact differences between the two models and how they are playing starlord. I’m generally looking for players to avoid casting starsurge when starlord is close to dropping off if they are not maxed out on astral power.