It’s literally just different colorways and / or material combinations. The hype recently has been silly, especially with some of the collaborations. There was a recent pair of 993s they did with jjjjjound (idk if I got the right number of j’s or not but you get the idea) and for shits and giggles I jumped in the virtual queue when they were released. Evidently there were 78k people in front of me. I know that number isn’t likely real, a lot of people using bots to buy and resell but I still thought it was crazy to see for a show that doesn’t look that much different than a general release. FWIW I buy my pairs either at or below retail. Anyone paying resale prices for NB has a screw loose.