[D-CEL]

That is almost too general a question, like asking “what is the better color red or blue?”
I think you need to give a little more detail as to what you want to do.
For Show or For Race? + 100 hp or + 500hp
Turbo: Single or dual? Side pipes?
Supercharge : Roots or Centrifugal? Hole in the hood or not? (Please not!!)
Induction: Blow thru or Draw thru? Carb or Fuel Injection?

Both make power, both have unique complexities.
Typically turbos make more power at a given boost level. Supercharges tend to be simpler to design and install and are a little less expensive.

I like Forced induction on late model cars where the op wants more power, but still needs to pass emissions and doesn’t want to violate the motor. In a Cobra I would ask “why?”
Brent or any of the other talented builders here could easily meet nearly any hp request without the added complexity, cost and weight of a forced induction system.
I do understand the draw if your building a “sleeper” I know “sleeper” and Cobra don’t normally go together, but Twin Turbo’s deal is just plain bad A$$!!
9’s at near a mid 140’s

Jason