Sushi-Beer issue of MySQL with utf8mb4

sushi_beer_can_distinguish.sql

SET NAMES utf8mb4;

DROP TABLE IF EXISTS wishlist_unicode_520;
CREATE TABLE wishlist_unicode_520 (
  item varchar(1)
) COLLATE utf8mb4_unicode_520_ci;

DROP TABLE IF EXISTS wishlist_bin;
CREATE TABLE wishlist_bin (
  item varchar(1)
) COLLATE utf8mb4_bin;

INSERT INTO wishlist_unicode_520 VALUES ('🍣'), ('🍺');
INSERT INTO wishlist_bin VALUES ('🍣'), ('🍺');

SELECT item, HEX(WEIGHT_STRING(item)) FROM wishlist_unicode_520 WHERE item = '🍣';
SELECT item, HEX(WEIGHT_STRING(item)) FROM wishlist_unicode_520;

SELECT item, HEX(WEIGHT_STRING(item)) FROM wishlist_bin WHERE item = '🍣';
SELECT item, HEX(WEIGHT_STRING(item)) FROM wishlist_bin;

sushi_beer_cant_distinguish.sql

SET NAMES utf8mb4;

DROP TABLE IF EXISTS wishlist_general;
CREATE TABLE wishlist_general (
  item varchar(1)
) COLLATE utf8mb4_general_ci;

DROP TABLE IF EXISTS wishlist_unicode;
CREATE TABLE wishlist_unicode (
  item varchar(1)
) COLLATE utf8mb4_unicode_ci;

INSERT INTO wishlist_general VALUES ('🍣'), ('🍺');
INSERT INTO wishlist_unicode VALUES ('🍣'), ('🍺');

SELECT item, HEX(WEIGHT_STRING(item)) FROM wishlist_general WHERE item = '🍣';
SELECT item, HEX(WEIGHT_STRING(item)) FROM wishlist_unicode WHERE item = '🍣';