You are right about Thomas. But Scalia would describe himself as a textualist and I think he is more of a strict constructionalist. He absolutely ignores original meaning where he thinks the text is clear. Thomas is quicker to delve into historical meaning to support his opinions, even where he believes the text is clear.
No. Scalia himself has described himself as an originalist. I spoke with him two years ago and he flatly denied that he was a textualist or constructionist.