Or HaChaim on Leviticus 24:22/אור החיים על ויקרא כ״ד:כ״ב

1 כגר כאזרת, convert and natural-born Israelite alike. The Torah did not write: הגר כאזרח, "the convert himself is equal to the natural-born Israelite." The reason is that in the scale of relative degrees of sanctity the convert ranks below the natural-born Israelite. The wording the Torah did use relates only to both categories of Israelites being equal before the law.