Hi, Nelo XXL has a wider bucket and more volume in the hull to handle the extra weight. The bucket flares towards the top to accommodate wider hips, but with taper can accommodate wide range of paddlers and keeps you centered well. I have both 550 XXL and 560 XXL and work great. I’m 95kg, 36 inch inseam. I have plenty of room to extend footplate even more, maybe 2 inches? Can check if needed.
For reference I cannot fit (due to hip width) in any Fenns or Thinks. Just fit in V10G3 and V10S but only with summer shorts. Both the Epic foot plates are just about maxed out, but very doable.
Let me know if any questions. Sure you know this, but I’ve learned the hard way with boats that are too snug on my hips
Good luck
Chris