Re: Position of the registered sign

To make it clear: There is a semantic difference because
superscripting makes it an annotation. Simply writing “Unicode®” with
the circle on the baseline seems wrong to me because it is like
writing “UnicodeReg. U.S. Pat. & Tm. Off.”.

Another discrepancy that I noticed concerns the hourglass emojis.
Originally, there was just one (⌛, U+231B). The reference glyph shows
all of the sand below, in some designs, however, the sand is still
flowing. Now that we have U+23F3 (⏳, hourglass with flowing sand), it
would make sense that U+231B is shown without flowing sand; in some
designs, however, this is not the case (perhaps to remain consistent
with how it was before) and U+23F3 has a greater proportion of the
sand at the top.