You've also suggested that 1S is possibly a resource. I know that starting spots always have X amount of resources. Is that number 4? Why do you think that resource is in 1S as opposed to the other squares. Presumably @Powerfaker is hoping this is a late game mineral given his comment that this would be superior for space victory. Wouldn't this be more likely in the surrounding hills?
I'd love some opinions on why these spots are better. If I was avoiding the coast I would have though 1S1W was superior as the fat cross would pick up the grassland tiles on the western edge of the fat cross.
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1S is is pure grassland - one of the few visible tiles that has neither a unit nor a forest on it. Many players will view such unforested spots as more likely to have a resource on them because experience shows that the random map generator is much less likely (or with some map types, will not) put certain resources under forests. However it's an educated guess, not a certain assumption - not least because, as @Noble Zarkon rightly points out, GOTM maps are often hand-edited by the mapmaker, and we may well choose to do things that the automatic map generator wouldn't do.
The other point is that if you want to go 1SW, you lose a turn moving, which basically (to a fair approximation) sets your entire game back one turn - so you'd better be getting something good to make up for that. Moving 1S costs you nothing in that regard as you can settle the same turn.