I have an STF XL 25mm from early 2023, which is the original density. As you can see, the bloom of the denser knot (left) is greater than the tighter original. I don't know if that's a standard variation thing or reflects a real difference since they're both set to 55mm loft, though the new knot is a bit shorter in overall length. Performance-wise there isn't a world of difference, just a subtle increase in backbone and face feel. Splay and flowthrough remain excellent, and the tips soft as a feather.Do you have one of the standard density versions to compare it to? I'm considering trying one of them out but can't find ANY comparative info for the extra dense knots!