I wouldn't say it's a version, more an anomaly. Surely 3mm of threaded alloy is not sufficient to hold everything tight? Probably why only a couple of them are out there.
I think Kingroon is more concerned about the 21 post, no photo, limited response to questions, demands for PayPal gift for a high value item, poor reputation as a seller:
I had to send the crankset back, it had a big dent in it. Also, it was a repaint. Never mentioned.
I would not trust this seller.
Getting my money back was a pain in the a**. Excuse my french!
I had to pay as "gift", when he sent the money back, it was not gift.
Also, I had to pay shipping back. Never saw that money again.
Lost about 40€ with this trade! Back off
also: worst packing ever.