Which spot
Every place you marked, read at the same hour.
One reading, run at each spot on the plan, so the only thing that changes between them is where you are standing. It compares what you have marked and nothing else — a corner the model has never been told about has no geometry and cannot be read.
Not full sun or shade. How much usable light actually arrives across a day, and whether the spot ever dries.
Starts at the hour this use normally happens. Move it to the hour that actually annoys you.
The best spot in July is regularly not the best spot in October, and that is the whole reason to check.
Something growing here is read across a whole day or year rather than at an hour, so ranking spots against a clock would be answering a different question. Compare a moment-based use here, or open the four-seasons view for that one.