I can't differentiate between them, but I think the Hungarian Spicy Soup, the Mendoza parillada and the caviar in Pushkin were all very special and should be at the top in no particular order.
I would remove 4 of your items from your list:
1. Camel Meat, which is supposed to be jsut like a good lean burger
2. Korduk, which I can't find anything on. Since it is supposed to be an Uzbek dish at the Alana Restaurant in Almaty, I think it was really shurpa (shurva or shorva), a soup made of large pieces of fatty meat (usually mutton) and fresh vegetables. This should have been easy to eat, but a Kosher person and a vegetarian have trouble with it.
3. Pig's blood - this is no different than any other type of animal blood except the maker has to be careful about trichinosis.
4. Shuwa
I would add these:
8. AR1 - At the Hongqiao Market, teams had to buy some items that were in a list, written in Mandarin: chicken feet, beetle larvae and squid
9. AR14 - Donguamen Night Market, eat four fried Chinese delicacies: a grasshopper, larva, scorpion, and a starfish
10. AR11 - Krakow market, eat 24 inches each of sausage (corrected as a result of comments by Dr. Rox below)
That makes my top 10 list:
1/2/3. AR6 Hungarian Spicy Soup, AR7 the Mendoza parillada and AR5 the caviar in Pushkin
4. AR15 Tokyo, Wasabi Sushi
5. AR4, Korea, live octopi
6. AR9, Lop Buri, Thailand eat a bowl of fried Crickets and grasshoppers
7. AR10, Antananarivo, Madagascar, eat cows lips
8. AR1 - At the Hongqiao Market, teams had to buy some items that were in a list, written in Mandarin: chicken feet, beetle larvae and squid
9. AR14 - Donguamen Night Market, eat four fried Chinese delicacies: a grasshopper, larva, scorpion, and a starfish
10. AR11 - Krakow market, eat 24 inches each of sausage