Since Byram has to be signed this summer - while Carlo has two more seasons - the Leafs might be leery of him. Mattias Samuelsson might be a different story - he's signed for three more seasons, and is three years younger than Carlo. The upside for Buffalo would be that Carlo is better defensively and more physical - plus he earns less than Samuelsson. If the Sabres made that trade - obviously with other pieces involved - they could then entice Byram to re-sign with the promise he'd be on the first pair with Rasmus Dahlin, while Owen Power - and the entire team - would benefit from having someone like Carlo paired with him.