Hello! Thanks for reading and for the question!
I can only speak to my own experience. I have a stupidly big head, and I’ve found the clamping force of the Arctis lineup to be just right. The suspension strap’s adjustment is mostly for adjusting the clamp, too, so it is possible to make them tighter by shortening the strap.
It’s possible that my larger head helped me out with that issue, so I can’t really speak to it.
I also have enough room inside the ear cups, though I’ll agree that they aren’t the most roomy. If you had issues with the Cloud, you’ll have a little more room here, but not like, a ton. The Arctis ear cups are angled inside, which helps provide a little extra room. The foam is the bigger issue. It’s super soft and squishy, and not as dense as some other foams…which means that they’ll squish down a little easier than some other pairs.
I would have loved to own a Siberia 200, but the adjustments weren’t quite large enough for my head, so it didn’t fit. Still one of the bigger bummers of my own personal headset history. I’m sorry if this answer was too late and you missed the sale, I only check my Medium comments on Fridays!