The apparent sizes of both the black and the blue background insert markers do change depending on the angle of view and the light. Here is a side by side of two different QC pics of the same watch.
So the 2's can look pretty similarly sized in the right light.
Unfortunately the apparent sizes of the two sets of markers go in opposite directions with viewing angle and lighting changes. The blue background markers appear larger, and the black background ones appear smaller, leading to what will probably be a frequent apparent size mismatch in normal use viewing.
+1 to all of the previously stated flaws. There is a visible slight speed bump at both join lines, it should not be a significant issue IMO.