Reactive tinnitus and hyperacusis are completely different symptoms. One can have hyperacusis and spiked tinnitus which is normal as the pain can cause the tinnitus to go through the roof. Also one can have reactive tinnitus without hyperacusis and any pain from sounds but tinnitus can still spike even after some low level sound.
I don't understand these things very well but I'm sure they are different. But some people can have both of them at the same time.
What about tinnitus that goes up when I am talking (sensitive to my own talking!) or deep breathing? Is this reactive tinnitus? I am also sensitive to some sounds during conversation.