All depends on how you drive it too. For instance, I race 17.5 Sedan exclusively and brakes aren't necessary. Even when they are, a quick stab is all you need and, if you make it real quick, the car won't spin out.
For most, the spool will be easier to drive because it drives similar to a regular diff equipped car. With a one-way, if you come off power too much at the wrong time the car will spin out and that makes it harder for less experianced drivers.
I'm not saying a one-way is better than a spool and when it comes to modified racing where brakes are used then the spool wins hands down (of course I use to run a one-way on my Super Nitro and still had to use the brakes on it without issues) but if you're running "stock" class you may want to give a one-way a shot.
Originally Posted by Marcos.J
you can also go with the gear diff in the front with a thick diff lube and have the best of both worlds
If you mean the best of a diff and a spool, yes. If you mean the best of a spool and a one way, not even close. (Figure you know what you meant but readers may not...