Neither of the anemones you mention are natural hosts for ocellaris. When clowns refuse to go in an anemone, I believe it's practically always because the anemone is not a natural host. That said, many ocellaris will eventually go to either a BTA or LTA. Of those two, BTAs live in the rocks and LTAs live in the sand. Generally speaking, BTAs are an easier species to keep. If you're not well acquainted with anemones, then a BTA might be more likely to live for you.