i think it doesnt matter how much sp you have.
the timing when and which post you vote is important.
if you vote a post which is trending and has already lets say 200 votes and 380$ , than that one will earn you a bit more curation reward than a post with 0 votes and 0$ !
a little bit unfair,
i am still learning myself more about how it works. it might seem unfair, but until this point, everything they implemented seems to be working so far. so lets wait and see !