Didn't have the chance to use the Nikes as I couldn't hit lvl 95 before they were removed so I can't compare them with Cally Steelheads.
I do use the Steelheads and find them to be a good club. The biggest difference from the TaylorMades I was using is the meter speed. Thats why I bought them. Distance is pretty much the same. I will say using backspin with them seems to stop the ball a little better than the TaylorMades, especially on uphill shots.
But as someone else said here, if you're thinking about replacing your Nikes with the Steelheads, rent them first to make sure you're not just blinded by the shiny new club.