The gc turn in are those that give you a shit ton of seal EVERY day and that are update 5 hours after the dungeon roulette/beast tribe
If you're unlucky even level 51 you can be ask for a lv49 recipe that give poor exp
But once you get HW recipe the exp is like... 5 time more !

When you're 58 with a star turn in you can get almost 90% of your level with 1 item

hw leves are worthless
Most of them cost a lot of comp and do not give good exp
(But they can give some really good comp and even blue script comp for culinarian)