I saw Timothy Boor using both with his Spektra Halo. I also have a little video that I will post soon of him tattooing.
Like with any rotary with give, if you use Hawk needles you will have to close the give to "none" since the spring of the Hawk needle has too much tension, therefore overpowering the resistance spring.

I've heard that the T-Techs work better.
In the end if you close the give you will be good with both.

But quoted from Tim's words after tattooing the whole weekend at Tattoo La Palooza with Spektra: "I can't wait to go back to my regular needles and tubes"