The only one of the four that I haven’t flown in business class is Singapore. Personally, I’d pick ANA over Turkish, although the Turkish Lounge in Istanbul is very nice. Turkish also has a stopover program. However, out of JFK, Turkish is likely to on 2 2 2 seating configuration, which is outdated. I read that they will be installing new seats beginning in 2025. Speaking of lounges, ANA’s JFK lounge is definitely sub par. I just flew in yesterday on ANA’s the room. It’s an excellent hard and soft product.