Razer Hammerhead Earbud Questions...

Hey, can someone help me out and let me know what's the difference between all these hammerhead earbuds... So I noticed on the razer site they have three different ones for sale. The (2019), Gen2 and the Pro's but when I went on Amazon to see what deals they have I noticed they have the old 2019, TW, TW X, and the TW Pro. From what I can tell... TW = Gen2 TW Pro = Pro...duh. TW X = ??? Not even listed on their site for sale, but have seen these in stores. I tried to look around a bit and the one thing I came across was the VERSUS site and they have the TW X as they best ones but from what I can tell the TW X have the (2019) style ear piece vs the Gen2 and pro ones.