I agree with all your comments.

There are actually several different Scintillations in the trade. They are all very similar and probably from the same seed lot. Some people can tell them apart. I don't know if one form is more sun tolerant than the others. I have 2 plants. One is more sun tolerant, but that may be because it is in moister soil. Mine get over 6 hours of sun. One burns nearly every year, some years worse than others. This year it looks good. Perhaps we had more moisture in the soil. They always bloom well.