The Supercharger is definitely faster, but a Bolt on a CCS DC Type-3 charger is slower, but in the same league.

On the other hand, the "user experience" of every Type-3 charger I've seen is terrible. The chargers are often in inconvenient places, the super thick cables are very short, and then you've got to try a couple of times to get the charger and the car to talk to each other and get the payment sorted out. Tesla wins on this hands down, and it's not even close.

Oddly enough, the Type-2 experience isn't nearly as bad. Other than requiring 6+ hours to charge...

I have a Bolt and a Model 3. The Bolt is a perfectly good car, but nowadays you'd be crazy to buy a Bolt, which is why in this area they are selling brand new for $14K under MSRP.