I think it may be as simple as what they're comfortable at. No obscure strategies.... no hidden weight-related tactics. That's the uniqueness about the HW division. It's open-ended. Deontay as Lyle said is a skinny HW, much like a HW Tommy Hearns. Fury like putting on the weight. Yes, he may feel he can use it to surprise Deontay with power but it's probably Fury just settling in to where he feels comfortable. He's a big man, and out of boxing he'll probably balloon up to the mid 300's for sure. Fascinating this size difference. It's not like one's tall and the other short. More like skinny versus borderline fat. Crossing my fingers it'll live up to the hype. Actually hoping it exceeds it, because many boxing insiders don't expect much.