hross 14,
I have never driven a SPF or ERA. I have seen them both up close, but it is hard to judge one against the other for me without them being next to each other.
The SPF & ERA are trully top shelf Cars and are priced accordingly.
The Backdraft cost is substantially less. Keeping that is mind I feel the Backdraft for the price is about as nice as you may find.
I have a Backdraft number 23. I am extremely happy with every thing about the car. The car was a completed turnkey. It is new from bumper to bumper with a cost at $37K. I believe that to be a lot less than either of the other cars.
The fit and finish on the Car is outstanding. It has many nice finishing touches, as with the stainless steel sidepipes, roll bar, engine bay. The body finish and paint seem excellent to me. The interior is all top quallity also.
I have only driven mine on the street, but the Bimmer suspession is precise and the car handles very well. The Bimmer Brakes do a great job stopping the car. To be honest the Bimmer brakes & suspession were the real selling point for me. I would definetly buy a Backdraft again in a heart beat. Especially with a price that is at the cap I set for a toy with limited use as a Cobra.
I am sorry that I could not be more help answering your question.
YOU need to inspect a couple of each brand and compare each for yourself. YOU will then better equiped to make the determination which car you want to buy!!
Bud
Ps. Since the backdraft is so new in the Cobra market, you probably could put that LS1 in it without getting your b***s cut off. Now there is food for thought! Good luck.