1. yes, they're infinitely adjustable. You turn the knob to make them harder or softer, they don't have just 5 presets like AGXs or Illuminas. Koni will even build them to your specs for custom valving or body length.

2. They're better.

3. Ground Controls are the best springs because again, they're built to your specs. You specify your spring rates, and you can order custom spring sizes too. You could also order their standard spring rates if you want, which are 350/250. Ground Controls do have the best sleeves in the business. All the other companies use cheap aluminum sleeves with "dual locking perches" which just corrode in place. Not to mention the wrenches included with those setups can be bent by hand.

If everyone was smart we'd all have GC/yellows as our setups. You can have completely custom specifications for under $1000, which makes all the high-end "full coilovers" look worthless.